./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe000_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe000_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/safe000_power.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/safe000_power.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-76401ed-m [2024-06-20 16:40:51,055 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:40:51,089 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:40:51,092 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:40:51,092 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:40:51,107 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:40:51,116 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:40:51,117 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:40:51,117 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:40:51,117 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:40:51,118 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:40:51,118 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:40:51,119 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:40:51,119 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:40:51,119 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:40:51,120 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:40:51,120 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:40:51,120 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:40:51,121 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:40:51,121 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:40:51,121 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:40:51,122 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:40:51,122 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:40:51,122 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:40:51,123 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:40:51,123 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:40:51,123 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:40:51,123 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:40:51,124 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:40:51,124 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:40:51,124 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:40:51,125 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:40:51,125 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:40:51,125 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:40:51,125 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:40:51,126 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:40:51,126 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:40:51,126 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:40:51,126 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:40:51,126 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:40:51,127 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:40:51,127 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:40:51,127 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:40:51,127 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:40:51,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:40:51,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:40:51,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:40:51,343 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:40:51,344 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:40:51,345 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe000_power.oepc.yml/witness.yml [2024-06-20 16:40:51,556 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:40:51,556 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:40:51,556 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe000_power.oepc.i [2024-06-20 16:40:52,573 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:40:52,823 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:40:52,824 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe000_power.oepc.i [2024-06-20 16:40:52,845 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8f09908a/f1b9971ad1024b268ee03b744bae0a87/FLAG01b5b5872 [2024-06-20 16:40:52,857 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8f09908a/f1b9971ad1024b268ee03b744bae0a87 [2024-06-20 16:40:52,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:40:52,859 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:40:52,861 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:40:52,861 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:40:52,865 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:40:52,866 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:40:51" (1/2) ... [2024-06-20 16:40:52,867 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2103d954 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:40:52, skipping insertion in model container [2024-06-20 16:40:52,867 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:40:51" (1/2) ... [2024-06-20 16:40:52,868 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@76ddb23f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:40:52, skipping insertion in model container [2024-06-20 16:40:52,868 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:40:52" (2/2) ... [2024-06-20 16:40:52,869 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2103d954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:40:52, skipping insertion in model container [2024-06-20 16:40:52,869 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:40:52" (2/2) ... [2024-06-20 16:40:52,869 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:40:52,989 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:40:52,990 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 2) && *__unbuffered_p0_EAX$read_delayed_var <= 127) && __unbuffered_p0_EAX$read_delayed_var == & y) && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-20 16:40:52,990 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 2) && *__unbuffered_p0_EAX$read_delayed_var <= 127) && __unbuffered_p0_EAX$read_delayed_var == & y) && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-20 16:40:52,990 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((((((((((((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 2) && *__unbuffered_p0_EAX$read_delayed_var <= 127) && __unbuffered_p0_EAX$read_delayed_var == & y) && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-20 16:40:52,991 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:40:52,991 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-20 16:40:53,021 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:40:53,321 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:40:53,331 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:40:53,455 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:40:53,493 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:40:53,494 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:40:53 WrapperNode [2024-06-20 16:40:53,494 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:40:53,495 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:40:53,495 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:40:53,495 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:40:53,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:40:53" (1/1) ... [2024-06-20 16:40:53,520 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:40:53" (1/1) ... [2024-06-20 16:40:53,554 INFO L138 Inliner]: procedures = 175, calls = 109, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 279 [2024-06-20 16:40:53,554 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:40:53,555 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:40:53,555 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:40:53,555 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:40:53,563 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:40:53" (1/1) ... [2024-06-20 16:40:53,563 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:40:53" (1/1) ... [2024-06-20 16:40:53,570 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:40:53" (1/1) ... [2024-06-20 16:40:53,586 INFO L175 MemorySlicer]: Split 68 memory accesses to 2 slices as follows [66, 2]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [1, 2]. The 11 writes are split as follows [11, 0]. [2024-06-20 16:40:53,586 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:40:53" (1/1) ... [2024-06-20 16:40:53,586 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:40:53" (1/1) ... [2024-06-20 16:40:53,601 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:40:53" (1/1) ... [2024-06-20 16:40:53,603 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:40:53" (1/1) ... [2024-06-20 16:40:53,605 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:40:53" (1/1) ... [2024-06-20 16:40:53,607 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:40:53" (1/1) ... [2024-06-20 16:40:53,611 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:40:53,612 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:40:53,612 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:40:53,612 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:40:53,612 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:40:53" (1/1) ... [2024-06-20 16:40:53,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:40:53,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:40:53,644 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) [2024-06-20 16:40:53,663 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 [2024-06-20 16:40:53,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-20 16:40:53,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-20 16:40:53,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-20 16:40:53,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-20 16:40:53,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:40:53,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:40:53,680 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:40:53,680 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:40:53,680 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:40:53,680 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:40:53,680 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:40:53,681 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:40:53,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:40:53,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-20 16:40:53,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:40:53,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:40:53,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:40:53,684 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:40:53,843 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:40:53,845 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:40:54,335 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:40:54,336 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:40:54,762 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:40:54,762 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:40:54,763 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:40:54 BoogieIcfgContainer [2024-06-20 16:40:54,763 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:40:54,765 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:40:54,765 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:40:54,767 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:40:54,767 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:40:51" (1/4) ... [2024-06-20 16:40:54,768 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df5ba80 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:40:54, skipping insertion in model container [2024-06-20 16:40:54,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:40:52" (2/4) ... [2024-06-20 16:40:54,768 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df5ba80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:40:54, skipping insertion in model container [2024-06-20 16:40:54,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:40:53" (3/4) ... [2024-06-20 16:40:54,768 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df5ba80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:40:54, skipping insertion in model container [2024-06-20 16:40:54,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:40:54" (4/4) ... [2024-06-20 16:40:54,769 INFO L112 eAbstractionObserver]: Analyzing ICFG safe000_power.oepc.i [2024-06-20 16:40:54,782 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:40:54,782 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 16:40:54,783 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:40:54,866 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:40:54,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 16:40:54,928 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-20 16:40:54,928 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:40:54,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:40:54,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 16:40:54,933 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-20 16:40:54,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:40:54,950 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;@7e3ed381, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:40:54,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 16:40:54,955 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:40:54,955 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:40:54,955 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:40:54,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:54,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:40:54,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:40:54,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:54,962 INFO L85 PathProgramCache]: Analyzing trace with hash 990473450, now seen corresponding path program 1 times [2024-06-20 16:40:54,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:54,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849273646] [2024-06-20 16:40:54,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:54,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:56,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:56,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849273646] [2024-06-20 16:40:56,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849273646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:56,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:56,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:40:56,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037376354] [2024-06-20 16:40:56,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:56,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:40:56,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:56,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:40:56,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:40:56,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:40:56,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2024-06-20 16:40:56,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:56,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:40:56,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:57,451 INFO L124 PetriNetUnfolderBase]: 1157/1772 cut-off events. [2024-06-20 16:40:57,452 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-20 16:40:57,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3593 conditions, 1772 events. 1157/1772 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8401 event pairs, 709 based on Foata normal form. 2/1744 useless extension candidates. Maximal degree in co-relation 3581. Up to 1741 conditions per place. [2024-06-20 16:40:57,462 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-20 16:40:57,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 187 flow [2024-06-20 16:40:57,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:40:57,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:40:57,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-20 16:40:57,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-20 16:40:57,473 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 70 transitions. [2024-06-20 16:40:57,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 187 flow [2024-06-20 16:40:57,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 16:40:57,476 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-20 16:40:57,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-20 16:40:57,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-20 16:40:57,480 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-20 16:40:57,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2024-06-20 16:40:57,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:57,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:57,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:40:57,481 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:40:57,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:57,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1636617571, now seen corresponding path program 1 times [2024-06-20 16:40:57,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:57,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146615017] [2024-06-20 16:40:57,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:57,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:59,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:59,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146615017] [2024-06-20 16:40:59,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146615017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:59,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:59,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:40:59,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610821361] [2024-06-20 16:40:59,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:59,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:40:59,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:59,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:40:59,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:40:59,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:40:59,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2024-06-20 16:40:59,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:59,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:40:59,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:00,489 INFO L124 PetriNetUnfolderBase]: 1148/1758 cut-off events. [2024-06-20 16:41:00,489 INFO L125 PetriNetUnfolderBase]: For 327/330 co-relation queries the response was YES. [2024-06-20 16:41:00,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4058 conditions, 1758 events. 1148/1758 cut-off events. For 327/330 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8274 event pairs, 585 based on Foata normal form. 6/1763 useless extension candidates. Maximal degree in co-relation 4046. Up to 1704 conditions per place. [2024-06-20 16:41:00,496 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-20 16:41:00,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 266 flow [2024-06-20 16:41:00,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:41:00,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:41:00,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-20 16:41:00,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-20 16:41:00,497 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 92 transitions. [2024-06-20 16:41:00,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 266 flow [2024-06-20 16:41:00,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:41:00,499 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-20 16:41:00,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-20 16:41:00,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-20 16:41:00,500 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-20 16:41:00,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2024-06-20 16:41:00,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:00,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:00,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:41:00,501 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:41:00,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:00,501 INFO L85 PathProgramCache]: Analyzing trace with hash 804464198, now seen corresponding path program 1 times [2024-06-20 16:41:00,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:00,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688066091] [2024-06-20 16:41:00,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:00,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:02,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:02,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688066091] [2024-06-20 16:41:02,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688066091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:02,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:02,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:41:02,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282104264] [2024-06-20 16:41:02,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:02,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:41:02,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:02,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:41:02,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:41:02,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:41:02,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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) [2024-06-20 16:41:02,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:02,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:41:02,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:03,666 INFO L124 PetriNetUnfolderBase]: 1375/2089 cut-off events. [2024-06-20 16:41:03,666 INFO L125 PetriNetUnfolderBase]: For 1062/1062 co-relation queries the response was YES. [2024-06-20 16:41:03,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5347 conditions, 2089 events. 1375/2089 cut-off events. For 1062/1062 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9829 event pairs, 547 based on Foata normal form. 4/2093 useless extension candidates. Maximal degree in co-relation 5333. Up to 2012 conditions per place. [2024-06-20 16:41:03,678 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 63 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-20 16:41:03,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 78 transitions, 395 flow [2024-06-20 16:41:03,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:41:03,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:41:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-20 16:41:03,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-20 16:41:03,684 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 110 transitions. [2024-06-20 16:41:03,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 78 transitions, 395 flow [2024-06-20 16:41:03,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 78 transitions, 374 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 16:41:03,687 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 208 flow [2024-06-20 16:41:03,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-06-20 16:41:03,688 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-20 16:41:03,689 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 208 flow [2024-06-20 16:41:03,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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) [2024-06-20 16:41:03,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:03,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:03,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:41:03,689 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:41:03,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:03,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1718531353, now seen corresponding path program 1 times [2024-06-20 16:41:03,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:03,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532282255] [2024-06-20 16:41:03,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:03,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:06,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:06,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532282255] [2024-06-20 16:41:06,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532282255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:06,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:06,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:41:06,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563895670] [2024-06-20 16:41:06,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:06,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:41:06,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:06,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:41:06,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:41:06,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:41:06,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 208 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 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) [2024-06-20 16:41:06,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:06,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:41:06,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:07,156 INFO L124 PetriNetUnfolderBase]: 1361/2067 cut-off events. [2024-06-20 16:41:07,156 INFO L125 PetriNetUnfolderBase]: For 1822/1822 co-relation queries the response was YES. [2024-06-20 16:41:07,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5847 conditions, 2067 events. 1361/2067 cut-off events. For 1822/1822 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9662 event pairs, 384 based on Foata normal form. 8/2075 useless extension candidates. Maximal degree in co-relation 5830. Up to 1942 conditions per place. [2024-06-20 16:41:07,169 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 69 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2024-06-20 16:41:07,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 86 transitions, 462 flow [2024-06-20 16:41:07,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:41:07,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:41:07,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-20 16:41:07,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 16:41:07,171 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 208 flow. Second operand 6 states and 126 transitions. [2024-06-20 16:41:07,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 86 transitions, 462 flow [2024-06-20 16:41:07,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 458 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 16:41:07,177 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 243 flow [2024-06-20 16:41:07,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-20 16:41:07,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-20 16:41:07,179 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 243 flow [2024-06-20 16:41:07,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 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) [2024-06-20 16:41:07,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:07,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:07,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:41:07,180 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:41:07,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:07,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1819418535, now seen corresponding path program 1 times [2024-06-20 16:41:07,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:07,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777018916] [2024-06-20 16:41:07,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:07,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:07,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:08,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:08,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777018916] [2024-06-20 16:41:08,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777018916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:08,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:08,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:41:08,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338567225] [2024-06-20 16:41:08,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:08,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:41:08,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:08,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:41:08,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:41:08,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:41:08,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 243 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 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) [2024-06-20 16:41:08,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:08,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:41:08,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:09,663 INFO L124 PetriNetUnfolderBase]: 1351/2052 cut-off events. [2024-06-20 16:41:09,664 INFO L125 PetriNetUnfolderBase]: For 2816/2816 co-relation queries the response was YES. [2024-06-20 16:41:09,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6222 conditions, 2052 events. 1351/2052 cut-off events. For 2816/2816 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9412 event pairs, 554 based on Foata normal form. 4/2056 useless extension candidates. Maximal degree in co-relation 6201. Up to 1994 conditions per place. [2024-06-20 16:41:09,679 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 59 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-20 16:41:09,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 456 flow [2024-06-20 16:41:09,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:41:09,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:41:09,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-20 16:41:09,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-20 16:41:09,689 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 243 flow. Second operand 5 states and 87 transitions. [2024-06-20 16:41:09,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 456 flow [2024-06-20 16:41:09,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 72 transitions, 423 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 16:41:09,692 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 289 flow [2024-06-20 16:41:09,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=289, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-20 16:41:09,692 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-20 16:41:09,692 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 289 flow [2024-06-20 16:41:09,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 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) [2024-06-20 16:41:09,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:09,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:09,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:41:09,693 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:41:09,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:09,693 INFO L85 PathProgramCache]: Analyzing trace with hash -624992564, now seen corresponding path program 1 times [2024-06-20 16:41:09,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:09,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851397578] [2024-06-20 16:41:09,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:09,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:12,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:12,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851397578] [2024-06-20 16:41:12,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851397578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:12,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:12,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:41:12,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985779353] [2024-06-20 16:41:12,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:12,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:41:12,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:12,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:41:12,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:41:12,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:41:12,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 289 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 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) [2024-06-20 16:41:12,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:12,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:41:12,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:14,228 INFO L124 PetriNetUnfolderBase]: 1369/2088 cut-off events. [2024-06-20 16:41:14,228 INFO L125 PetriNetUnfolderBase]: For 3831/3833 co-relation queries the response was YES. [2024-06-20 16:41:14,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6788 conditions, 2088 events. 1369/2088 cut-off events. For 3831/3833 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9815 event pairs, 494 based on Foata normal form. 5/2093 useless extension candidates. Maximal degree in co-relation 6764. Up to 1926 conditions per place. [2024-06-20 16:41:14,240 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 71 selfloop transitions, 24 changer transitions 0/99 dead transitions. [2024-06-20 16:41:14,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 99 transitions, 633 flow [2024-06-20 16:41:14,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:41:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:41:14,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 16:41:14,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-20 16:41:14,242 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 289 flow. Second operand 7 states and 132 transitions. [2024-06-20 16:41:14,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 99 transitions, 633 flow [2024-06-20 16:41:14,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 99 transitions, 629 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-20 16:41:14,246 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 387 flow [2024-06-20 16:41:14,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=387, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-06-20 16:41:14,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-20 16:41:14,249 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 387 flow [2024-06-20 16:41:14,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 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) [2024-06-20 16:41:14,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:14,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:14,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:41:14,250 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:41:14,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:14,250 INFO L85 PathProgramCache]: Analyzing trace with hash -624872408, now seen corresponding path program 1 times [2024-06-20 16:41:14,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:14,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151714840] [2024-06-20 16:41:14,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:14,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:14,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:17,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:17,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151714840] [2024-06-20 16:41:17,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151714840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:17,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:17,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:41:17,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936541416] [2024-06-20 16:41:17,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:17,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:41:17,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:17,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:41:17,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:41:17,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:41:17,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 387 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 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) [2024-06-20 16:41:17,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:17,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:41:17,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:18,500 INFO L124 PetriNetUnfolderBase]: 1615/2434 cut-off events. [2024-06-20 16:41:18,500 INFO L125 PetriNetUnfolderBase]: For 6160/6162 co-relation queries the response was YES. [2024-06-20 16:41:18,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8482 conditions, 2434 events. 1615/2434 cut-off events. For 6160/6162 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11451 event pairs, 510 based on Foata normal form. 12/2446 useless extension candidates. Maximal degree in co-relation 8455. Up to 2148 conditions per place. [2024-06-20 16:41:18,512 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 89 selfloop transitions, 33 changer transitions 0/126 dead transitions. [2024-06-20 16:41:18,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 126 transitions, 881 flow [2024-06-20 16:41:18,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:41:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:41:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 16:41:18,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 16:41:18,514 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 387 flow. Second operand 9 states and 166 transitions. [2024-06-20 16:41:18,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 126 transitions, 881 flow [2024-06-20 16:41:18,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 126 transitions, 844 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:41:18,520 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 544 flow [2024-06-20 16:41:18,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=544, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2024-06-20 16:41:18,520 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-20 16:41:18,520 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 544 flow [2024-06-20 16:41:18,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 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) [2024-06-20 16:41:18,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:18,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:18,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:41:18,521 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:41:18,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:18,521 INFO L85 PathProgramCache]: Analyzing trace with hash -624872594, now seen corresponding path program 2 times [2024-06-20 16:41:18,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:18,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538025853] [2024-06-20 16:41:18,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:18,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:21,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:21,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538025853] [2024-06-20 16:41:21,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538025853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:21,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:21,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:41:21,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982344368] [2024-06-20 16:41:21,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:21,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:41:21,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:21,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:41:21,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:41:21,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:41:21,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 544 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 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) [2024-06-20 16:41:21,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:21,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:41:21,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:22,767 INFO L124 PetriNetUnfolderBase]: 1633/2468 cut-off events. [2024-06-20 16:41:22,767 INFO L125 PetriNetUnfolderBase]: For 8744/8746 co-relation queries the response was YES. [2024-06-20 16:41:22,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9898 conditions, 2468 events. 1633/2468 cut-off events. For 8744/8746 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11660 event pairs, 523 based on Foata normal form. 5/2473 useless extension candidates. Maximal degree in co-relation 9867. Up to 2334 conditions per place. [2024-06-20 16:41:22,786 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 87 selfloop transitions, 22 changer transitions 0/113 dead transitions. [2024-06-20 16:41:22,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 113 transitions, 880 flow [2024-06-20 16:41:22,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:41:22,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:41:22,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 16:41:22,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-20 16:41:22,791 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 544 flow. Second operand 7 states and 125 transitions. [2024-06-20 16:41:22,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 113 transitions, 880 flow [2024-06-20 16:41:22,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 113 transitions, 831 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 16:41:22,800 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 579 flow [2024-06-20 16:41:22,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=579, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2024-06-20 16:41:22,802 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-20 16:41:22,802 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 579 flow [2024-06-20 16:41:22,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 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) [2024-06-20 16:41:22,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:22,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:22,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:41:22,803 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:41:22,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:22,803 INFO L85 PathProgramCache]: Analyzing trace with hash 880345414, now seen corresponding path program 2 times [2024-06-20 16:41:22,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:22,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804443633] [2024-06-20 16:41:22,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:22,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:25,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:25,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804443633] [2024-06-20 16:41:25,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804443633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:25,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:25,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:41:25,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565679054] [2024-06-20 16:41:25,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:25,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:41:25,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:25,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:41:25,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:41:25,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:41:25,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 82 transitions, 579 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 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) [2024-06-20 16:41:25,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:25,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:41:25,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:26,503 INFO L124 PetriNetUnfolderBase]: 1645/2486 cut-off events. [2024-06-20 16:41:26,503 INFO L125 PetriNetUnfolderBase]: For 10299/10301 co-relation queries the response was YES. [2024-06-20 16:41:26,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10153 conditions, 2486 events. 1645/2486 cut-off events. For 10299/10301 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11784 event pairs, 501 based on Foata normal form. 12/2498 useless extension candidates. Maximal degree in co-relation 10120. Up to 2187 conditions per place. [2024-06-20 16:41:26,517 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 77 selfloop transitions, 36 changer transitions 0/117 dead transitions. [2024-06-20 16:41:26,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 117 transitions, 940 flow [2024-06-20 16:41:26,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:41:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:41:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 16:41:26,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-20 16:41:26,519 INFO L175 Difference]: Start difference. First operand has 76 places, 82 transitions, 579 flow. Second operand 7 states and 128 transitions. [2024-06-20 16:41:26,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 117 transitions, 940 flow [2024-06-20 16:41:26,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 886 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 16:41:26,530 INFO L231 Difference]: Finished difference. Result has 79 places, 87 transitions, 675 flow [2024-06-20 16:41:26,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=675, PETRI_PLACES=79, PETRI_TRANSITIONS=87} [2024-06-20 16:41:26,531 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-20 16:41:26,531 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 87 transitions, 675 flow [2024-06-20 16:41:26,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 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) [2024-06-20 16:41:26,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:26,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:26,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:41:26,532 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:41:26,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:26,532 INFO L85 PathProgramCache]: Analyzing trace with hash 880351924, now seen corresponding path program 3 times [2024-06-20 16:41:26,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:26,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742092273] [2024-06-20 16:41:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:26,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:26,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:28,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:28,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742092273] [2024-06-20 16:41:28,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742092273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:28,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:28,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:41:28,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217387212] [2024-06-20 16:41:28,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:28,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:41:28,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:28,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:41:28,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:41:28,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:41:28,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 87 transitions, 675 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 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) [2024-06-20 16:41:28,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:28,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:41:28,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:29,796 INFO L124 PetriNetUnfolderBase]: 1635/2470 cut-off events. [2024-06-20 16:41:29,797 INFO L125 PetriNetUnfolderBase]: For 12332/12342 co-relation queries the response was YES. [2024-06-20 16:41:29,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10766 conditions, 2470 events. 1635/2470 cut-off events. For 12332/12342 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11567 event pairs, 554 based on Foata normal form. 14/2484 useless extension candidates. Maximal degree in co-relation 10731. Up to 2283 conditions per place. [2024-06-20 16:41:29,816 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 97 selfloop transitions, 22 changer transitions 0/123 dead transitions. [2024-06-20 16:41:29,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 123 transitions, 1091 flow [2024-06-20 16:41:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:41:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:41:29,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-20 16:41:29,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:41:29,833 INFO L175 Difference]: Start difference. First operand has 79 places, 87 transitions, 675 flow. Second operand 6 states and 105 transitions. [2024-06-20 16:41:29,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 123 transitions, 1091 flow [2024-06-20 16:41:29,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 123 transitions, 1012 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 16:41:29,848 INFO L231 Difference]: Finished difference. Result has 83 places, 100 transitions, 809 flow [2024-06-20 16:41:29,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=809, PETRI_PLACES=83, PETRI_TRANSITIONS=100} [2024-06-20 16:41:29,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-20 16:41:29,850 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 100 transitions, 809 flow [2024-06-20 16:41:29,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 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) [2024-06-20 16:41:29,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:29,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:29,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:41:29,851 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:41:29,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:29,851 INFO L85 PathProgramCache]: Analyzing trace with hash 880345228, now seen corresponding path program 3 times [2024-06-20 16:41:29,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:29,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006338010] [2024-06-20 16:41:29,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:29,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:32,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:32,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006338010] [2024-06-20 16:41:32,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006338010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:32,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:32,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:41:32,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918816917] [2024-06-20 16:41:32,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:32,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:41:32,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:32,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:41:32,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:41:32,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:41:32,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 100 transitions, 809 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 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) [2024-06-20 16:41:32,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:32,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:41:32,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:33,650 INFO L124 PetriNetUnfolderBase]: 1627/2455 cut-off events. [2024-06-20 16:41:33,651 INFO L125 PetriNetUnfolderBase]: For 14345/14347 co-relation queries the response was YES. [2024-06-20 16:41:33,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11088 conditions, 2455 events. 1627/2455 cut-off events. For 14345/14347 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11548 event pairs, 528 based on Foata normal form. 5/2460 useless extension candidates. Maximal degree in co-relation 11050. Up to 2287 conditions per place. [2024-06-20 16:41:33,695 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 92 selfloop transitions, 32 changer transitions 0/128 dead transitions. [2024-06-20 16:41:33,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 128 transitions, 1133 flow [2024-06-20 16:41:33,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:41:33,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:41:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-20 16:41:33,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:41:33,698 INFO L175 Difference]: Start difference. First operand has 83 places, 100 transitions, 809 flow. Second operand 6 states and 114 transitions. [2024-06-20 16:41:33,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 128 transitions, 1133 flow [2024-06-20 16:41:33,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 128 transitions, 1099 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-20 16:41:33,734 INFO L231 Difference]: Finished difference. Result has 88 places, 100 transitions, 860 flow [2024-06-20 16:41:33,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=860, PETRI_PLACES=88, PETRI_TRANSITIONS=100} [2024-06-20 16:41:33,735 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-20 16:41:33,735 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 100 transitions, 860 flow [2024-06-20 16:41:33,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 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) [2024-06-20 16:41:33,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:33,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:33,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:41:33,736 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:41:33,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:33,736 INFO L85 PathProgramCache]: Analyzing trace with hash 880591492, now seen corresponding path program 1 times [2024-06-20 16:41:33,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:33,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570582992] [2024-06-20 16:41:33,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:33,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:36,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:36,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570582992] [2024-06-20 16:41:36,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570582992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:36,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:36,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:41:36,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131714434] [2024-06-20 16:41:36,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:36,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:41:36,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:36,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:41:36,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:41:36,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:41:36,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 100 transitions, 860 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 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) [2024-06-20 16:41:36,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:36,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:41:36,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:37,069 INFO L124 PetriNetUnfolderBase]: 1619/2443 cut-off events. [2024-06-20 16:41:37,069 INFO L125 PetriNetUnfolderBase]: For 16034/16036 co-relation queries the response was YES. [2024-06-20 16:41:37,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11251 conditions, 2443 events. 1619/2443 cut-off events. For 16034/16036 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11320 event pairs, 532 based on Foata normal form. 6/2449 useless extension candidates. Maximal degree in co-relation 11210. Up to 2351 conditions per place. [2024-06-20 16:41:37,096 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 109 selfloop transitions, 11 changer transitions 0/124 dead transitions. [2024-06-20 16:41:37,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 124 transitions, 1169 flow [2024-06-20 16:41:37,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:41:37,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:41:37,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-20 16:41:37,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:41:37,098 INFO L175 Difference]: Start difference. First operand has 88 places, 100 transitions, 860 flow. Second operand 6 states and 102 transitions. [2024-06-20 16:41:37,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 124 transitions, 1169 flow [2024-06-20 16:41:37,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 124 transitions, 1101 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 16:41:37,115 INFO L231 Difference]: Finished difference. Result has 89 places, 102 transitions, 839 flow [2024-06-20 16:41:37,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=839, PETRI_PLACES=89, PETRI_TRANSITIONS=102} [2024-06-20 16:41:37,116 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-20 16:41:37,116 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 102 transitions, 839 flow [2024-06-20 16:41:37,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 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) [2024-06-20 16:41:37,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:37,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:37,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:41:37,117 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:41:37,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:37,117 INFO L85 PathProgramCache]: Analyzing trace with hash 232869483, now seen corresponding path program 1 times [2024-06-20 16:41:37,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:37,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176624167] [2024-06-20 16:41:37,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:37,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:39,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:39,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176624167] [2024-06-20 16:41:39,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176624167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:39,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:39,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:41:39,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989200386] [2024-06-20 16:41:39,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:39,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:41:39,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:39,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:41:39,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:41:39,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:41:39,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 102 transitions, 839 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:39,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:39,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:41:39,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:41,395 INFO L124 PetriNetUnfolderBase]: 1847/2783 cut-off events. [2024-06-20 16:41:41,395 INFO L125 PetriNetUnfolderBase]: For 18274/18276 co-relation queries the response was YES. [2024-06-20 16:41:41,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12722 conditions, 2783 events. 1847/2783 cut-off events. For 18274/18276 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13253 event pairs, 547 based on Foata normal form. 12/2795 useless extension candidates. Maximal degree in co-relation 12680. Up to 2114 conditions per place. [2024-06-20 16:41:41,411 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 109 selfloop transitions, 67 changer transitions 0/180 dead transitions. [2024-06-20 16:41:41,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 180 transitions, 1573 flow [2024-06-20 16:41:41,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:41:41,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:41:41,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-20 16:41:41,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:41:41,413 INFO L175 Difference]: Start difference. First operand has 89 places, 102 transitions, 839 flow. Second operand 11 states and 209 transitions. [2024-06-20 16:41:41,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 180 transitions, 1573 flow [2024-06-20 16:41:41,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 180 transitions, 1544 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 16:41:41,428 INFO L231 Difference]: Finished difference. Result has 98 places, 116 transitions, 1102 flow [2024-06-20 16:41:41,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1102, PETRI_PLACES=98, PETRI_TRANSITIONS=116} [2024-06-20 16:41:41,429 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-20 16:41:41,429 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 116 transitions, 1102 flow [2024-06-20 16:41:41,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:41,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:41,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:41,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:41:41,430 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:41:41,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:41,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2103788319, now seen corresponding path program 2 times [2024-06-20 16:41:41,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:41,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951381685] [2024-06-20 16:41:41,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:41,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:44,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:44,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951381685] [2024-06-20 16:41:44,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951381685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:44,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:44,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:41:44,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124375774] [2024-06-20 16:41:44,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:44,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:41:44,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:44,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:41:44,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:41:44,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:41:44,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 116 transitions, 1102 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:44,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:44,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:41:44,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:45,661 INFO L124 PetriNetUnfolderBase]: 2016/3050 cut-off events. [2024-06-20 16:41:45,661 INFO L125 PetriNetUnfolderBase]: For 25191/25193 co-relation queries the response was YES. [2024-06-20 16:41:45,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15509 conditions, 3050 events. 2016/3050 cut-off events. For 25191/25193 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14818 event pairs, 602 based on Foata normal form. 12/3062 useless extension candidates. Maximal degree in co-relation 15464. Up to 2531 conditions per place. [2024-06-20 16:41:45,680 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 127 selfloop transitions, 56 changer transitions 0/187 dead transitions. [2024-06-20 16:41:45,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 187 transitions, 1870 flow [2024-06-20 16:41:45,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:45,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:45,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-20 16:41:45,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-20 16:41:45,686 INFO L175 Difference]: Start difference. First operand has 98 places, 116 transitions, 1102 flow. Second operand 10 states and 193 transitions. [2024-06-20 16:41:45,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 187 transitions, 1870 flow [2024-06-20 16:41:45,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 187 transitions, 1723 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-20 16:41:45,755 INFO L231 Difference]: Finished difference. Result has 103 places, 129 transitions, 1254 flow [2024-06-20 16:41:45,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1254, PETRI_PLACES=103, PETRI_TRANSITIONS=129} [2024-06-20 16:41:45,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-20 16:41:45,762 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 129 transitions, 1254 flow [2024-06-20 16:41:45,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:45,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:45,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:45,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:41:45,762 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:41:45,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:45,763 INFO L85 PathProgramCache]: Analyzing trace with hash 2103793899, now seen corresponding path program 3 times [2024-06-20 16:41:45,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:45,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655001189] [2024-06-20 16:41:45,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:45,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:49,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:49,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655001189] [2024-06-20 16:41:49,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655001189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:49,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:49,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:41:49,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139238477] [2024-06-20 16:41:49,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:49,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:41:49,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:49,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:41:49,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:41:49,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:41:49,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 129 transitions, 1254 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:49,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:49,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:41:49,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:50,924 INFO L124 PetriNetUnfolderBase]: 2028/3076 cut-off events. [2024-06-20 16:41:50,925 INFO L125 PetriNetUnfolderBase]: For 28460/28462 co-relation queries the response was YES. [2024-06-20 16:41:50,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16244 conditions, 3076 events. 2028/3076 cut-off events. For 28460/28462 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15020 event pairs, 590 based on Foata normal form. 12/3088 useless extension candidates. Maximal degree in co-relation 16196. Up to 2544 conditions per place. [2024-06-20 16:41:50,940 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 133 selfloop transitions, 62 changer transitions 0/199 dead transitions. [2024-06-20 16:41:50,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 199 transitions, 1938 flow [2024-06-20 16:41:50,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:41:50,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:41:50,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 224 transitions. [2024-06-20 16:41:50,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 16:41:50,943 INFO L175 Difference]: Start difference. First operand has 103 places, 129 transitions, 1254 flow. Second operand 12 states and 224 transitions. [2024-06-20 16:41:50,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 199 transitions, 1938 flow [2024-06-20 16:41:50,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 199 transitions, 1845 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 16:41:50,994 INFO L231 Difference]: Finished difference. Result has 109 places, 133 transitions, 1350 flow [2024-06-20 16:41:50,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1350, PETRI_PLACES=109, PETRI_TRANSITIONS=133} [2024-06-20 16:41:50,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-20 16:41:50,995 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 133 transitions, 1350 flow [2024-06-20 16:41:50,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:50,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:50,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:50,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:41:50,996 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:41:50,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:50,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1708565385, now seen corresponding path program 4 times [2024-06-20 16:41:50,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:50,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025944006] [2024-06-20 16:41:50,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:50,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:53,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:53,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025944006] [2024-06-20 16:41:53,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025944006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:53,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:53,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:41:53,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880760568] [2024-06-20 16:41:53,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:53,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:41:53,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:53,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:41:53,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:41:53,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:41:53,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 133 transitions, 1350 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:53,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:53,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:41:53,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:55,453 INFO L124 PetriNetUnfolderBase]: 2208/3372 cut-off events. [2024-06-20 16:41:55,453 INFO L125 PetriNetUnfolderBase]: For 34088/34090 co-relation queries the response was YES. [2024-06-20 16:41:55,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18403 conditions, 3372 events. 2208/3372 cut-off events. For 34088/34090 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17056 event pairs, 583 based on Foata normal form. 12/3384 useless extension candidates. Maximal degree in co-relation 18353. Up to 2580 conditions per place. [2024-06-20 16:41:55,524 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 126 selfloop transitions, 77 changer transitions 0/207 dead transitions. [2024-06-20 16:41:55,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 207 transitions, 2265 flow [2024-06-20 16:41:55,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:41:55,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:41:55,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-20 16:41:55,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-20 16:41:55,526 INFO L175 Difference]: Start difference. First operand has 109 places, 133 transitions, 1350 flow. Second operand 9 states and 178 transitions. [2024-06-20 16:41:55,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 207 transitions, 2265 flow [2024-06-20 16:41:55,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 207 transitions, 2075 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-20 16:41:55,558 INFO L231 Difference]: Finished difference. Result has 110 places, 153 transitions, 1669 flow [2024-06-20 16:41:55,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1669, PETRI_PLACES=110, PETRI_TRANSITIONS=153} [2024-06-20 16:41:55,558 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-20 16:41:55,559 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 153 transitions, 1669 flow [2024-06-20 16:41:55,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:55,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:55,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:55,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:41:55,559 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:41:55,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:55,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1797962425, now seen corresponding path program 5 times [2024-06-20 16:41:55,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:55,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813617865] [2024-06-20 16:41:55,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:55,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:58,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:58,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813617865] [2024-06-20 16:41:58,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813617865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:58,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:58,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:41:58,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575191012] [2024-06-20 16:41:58,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:58,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:41:58,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:58,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:41:58,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:41:58,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:41:58,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 153 transitions, 1669 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:58,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:58,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:41:58,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:59,990 INFO L124 PetriNetUnfolderBase]: 2220/3390 cut-off events. [2024-06-20 16:41:59,991 INFO L125 PetriNetUnfolderBase]: For 38382/38384 co-relation queries the response was YES. [2024-06-20 16:42:00,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19269 conditions, 3390 events. 2220/3390 cut-off events. For 38382/38384 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 17092 event pairs, 557 based on Foata normal form. 12/3402 useless extension candidates. Maximal degree in co-relation 19216. Up to 2593 conditions per place. [2024-06-20 16:42:00,014 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 116 selfloop transitions, 84 changer transitions 0/204 dead transitions. [2024-06-20 16:42:00,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 204 transitions, 2297 flow [2024-06-20 16:42:00,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:42:00,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:42:00,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 16:42:00,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-20 16:42:00,016 INFO L175 Difference]: Start difference. First operand has 110 places, 153 transitions, 1669 flow. Second operand 9 states and 170 transitions. [2024-06-20 16:42:00,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 204 transitions, 2297 flow [2024-06-20 16:42:00,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 204 transitions, 2172 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 16:42:00,071 INFO L231 Difference]: Finished difference. Result has 115 places, 158 transitions, 1838 flow [2024-06-20 16:42:00,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1838, PETRI_PLACES=115, PETRI_TRANSITIONS=158} [2024-06-20 16:42:00,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-20 16:42:00,072 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 158 transitions, 1838 flow [2024-06-20 16:42:00,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:00,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:00,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:00,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:42:00,073 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:42:00,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:00,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1528257775, now seen corresponding path program 6 times [2024-06-20 16:42:00,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:00,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286351323] [2024-06-20 16:42:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:00,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:02,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:02,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286351323] [2024-06-20 16:42:02,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286351323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:02,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:02,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:42:02,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701463596] [2024-06-20 16:42:02,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:02,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:42:02,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:02,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:42:02,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:42:02,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:42:02,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 158 transitions, 1838 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:02,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:02,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:42:02,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:04,074 INFO L124 PetriNetUnfolderBase]: 2210/3398 cut-off events. [2024-06-20 16:42:04,074 INFO L125 PetriNetUnfolderBase]: For 42133/42154 co-relation queries the response was YES. [2024-06-20 16:42:04,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19719 conditions, 3398 events. 2210/3398 cut-off events. For 42133/42154 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17268 event pairs, 652 based on Foata normal form. 25/3423 useless extension candidates. Maximal degree in co-relation 19664. Up to 2928 conditions per place. [2024-06-20 16:42:04,094 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 171 selfloop transitions, 45 changer transitions 0/220 dead transitions. [2024-06-20 16:42:04,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 220 transitions, 2617 flow [2024-06-20 16:42:04,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:42:04,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:42:04,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 16:42:04,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-20 16:42:04,096 INFO L175 Difference]: Start difference. First operand has 115 places, 158 transitions, 1838 flow. Second operand 9 states and 157 transitions. [2024-06-20 16:42:04,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 220 transitions, 2617 flow [2024-06-20 16:42:04,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 220 transitions, 2460 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 16:42:04,154 INFO L231 Difference]: Finished difference. Result has 121 places, 176 transitions, 2075 flow [2024-06-20 16:42:04,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2075, PETRI_PLACES=121, PETRI_TRANSITIONS=176} [2024-06-20 16:42:04,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-20 16:42:04,155 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 176 transitions, 2075 flow [2024-06-20 16:42:04,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:04,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:04,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:04,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:42:04,156 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:42:04,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:04,156 INFO L85 PathProgramCache]: Analyzing trace with hash 295506313, now seen corresponding path program 1 times [2024-06-20 16:42:04,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:04,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025591836] [2024-06-20 16:42:04,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:04,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:06,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:06,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025591836] [2024-06-20 16:42:06,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025591836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:06,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:06,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:42:06,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309018519] [2024-06-20 16:42:06,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:06,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:42:06,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:06,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:42:06,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:42:06,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:42:06,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 176 transitions, 2075 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:06,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:06,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:42:06,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:08,160 INFO L124 PetriNetUnfolderBase]: 2502/3843 cut-off events. [2024-06-20 16:42:08,160 INFO L125 PetriNetUnfolderBase]: For 51669/51681 co-relation queries the response was YES. [2024-06-20 16:42:08,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23028 conditions, 3843 events. 2502/3843 cut-off events. For 51669/51681 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19918 event pairs, 691 based on Foata normal form. 18/3861 useless extension candidates. Maximal degree in co-relation 22970. Up to 3273 conditions per place. [2024-06-20 16:42:08,188 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 196 selfloop transitions, 92 changer transitions 0/292 dead transitions. [2024-06-20 16:42:08,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 292 transitions, 3784 flow [2024-06-20 16:42:08,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:42:08,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:42:08,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 16:42:08,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-20 16:42:08,190 INFO L175 Difference]: Start difference. First operand has 121 places, 176 transitions, 2075 flow. Second operand 9 states and 170 transitions. [2024-06-20 16:42:08,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 292 transitions, 3784 flow [2024-06-20 16:42:08,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 292 transitions, 3628 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-20 16:42:08,273 INFO L231 Difference]: Finished difference. Result has 128 places, 233 transitions, 3027 flow [2024-06-20 16:42:08,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1981, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3027, PETRI_PLACES=128, PETRI_TRANSITIONS=233} [2024-06-20 16:42:08,273 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-20 16:42:08,274 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 233 transitions, 3027 flow [2024-06-20 16:42:08,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:08,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:08,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:08,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:42:08,274 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:42:08,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:08,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1373840255, now seen corresponding path program 2 times [2024-06-20 16:42:08,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:08,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933809024] [2024-06-20 16:42:08,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:08,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:11,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:11,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933809024] [2024-06-20 16:42:11,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933809024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:11,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:11,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:42:11,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242294048] [2024-06-20 16:42:11,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:11,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:42:11,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:11,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:42:11,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:42:11,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:42:11,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 233 transitions, 3027 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:11,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:11,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:42:11,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:12,775 INFO L124 PetriNetUnfolderBase]: 2530/3907 cut-off events. [2024-06-20 16:42:12,775 INFO L125 PetriNetUnfolderBase]: For 58650/58662 co-relation queries the response was YES. [2024-06-20 16:42:12,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24188 conditions, 3907 events. 2530/3907 cut-off events. For 58650/58662 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 20589 event pairs, 527 based on Foata normal form. 18/3925 useless extension candidates. Maximal degree in co-relation 24126. Up to 3124 conditions per place. [2024-06-20 16:42:12,800 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 177 selfloop transitions, 100 changer transitions 0/281 dead transitions. [2024-06-20 16:42:12,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 281 transitions, 3923 flow [2024-06-20 16:42:12,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:42:12,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:42:12,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:42:12,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 16:42:12,803 INFO L175 Difference]: Start difference. First operand has 128 places, 233 transitions, 3027 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:42:12,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 281 transitions, 3923 flow [2024-06-20 16:42:12,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 281 transitions, 3840 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-20 16:42:12,894 INFO L231 Difference]: Finished difference. Result has 134 places, 237 transitions, 3250 flow [2024-06-20 16:42:12,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2944, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3250, PETRI_PLACES=134, PETRI_TRANSITIONS=237} [2024-06-20 16:42:12,894 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-20 16:42:12,894 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 237 transitions, 3250 flow [2024-06-20 16:42:12,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:12,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:12,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:12,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:42:12,895 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:42:12,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:12,896 INFO L85 PathProgramCache]: Analyzing trace with hash 674838093, now seen corresponding path program 3 times [2024-06-20 16:42:12,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:12,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241520222] [2024-06-20 16:42:12,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:12,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:15,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:15,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241520222] [2024-06-20 16:42:15,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241520222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:15,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:15,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:42:15,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688307196] [2024-06-20 16:42:15,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:15,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:42:15,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:15,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:42:15,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:42:15,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:42:15,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 237 transitions, 3250 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:15,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:15,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:42:15,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:17,249 INFO L124 PetriNetUnfolderBase]: 2586/3994 cut-off events. [2024-06-20 16:42:17,249 INFO L125 PetriNetUnfolderBase]: For 65611/65623 co-relation queries the response was YES. [2024-06-20 16:42:17,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25261 conditions, 3994 events. 2586/3994 cut-off events. For 65611/65623 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21096 event pairs, 685 based on Foata normal form. 24/4018 useless extension candidates. Maximal degree in co-relation 25197. Up to 3458 conditions per place. [2024-06-20 16:42:17,279 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 185 selfloop transitions, 94 changer transitions 0/283 dead transitions. [2024-06-20 16:42:17,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 283 transitions, 4067 flow [2024-06-20 16:42:17,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:42:17,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:42:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:42:17,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 16:42:17,281 INFO L175 Difference]: Start difference. First operand has 134 places, 237 transitions, 3250 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:42:17,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 283 transitions, 4067 flow [2024-06-20 16:42:17,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 283 transitions, 3906 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-20 16:42:17,404 INFO L231 Difference]: Finished difference. Result has 138 places, 241 transitions, 3386 flow [2024-06-20 16:42:17,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3099, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3386, PETRI_PLACES=138, PETRI_TRANSITIONS=241} [2024-06-20 16:42:17,404 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-20 16:42:17,405 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 241 transitions, 3386 flow [2024-06-20 16:42:17,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:17,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:17,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:17,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:42:17,405 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:42:17,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:17,406 INFO L85 PathProgramCache]: Analyzing trace with hash 792925773, now seen corresponding path program 4 times [2024-06-20 16:42:17,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:17,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788225203] [2024-06-20 16:42:17,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:17,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:20,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:20,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788225203] [2024-06-20 16:42:20,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788225203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:20,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:20,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:42:20,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718748316] [2024-06-20 16:42:20,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:20,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:42:20,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:20,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:42:20,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:42:20,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:42:20,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 241 transitions, 3386 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:20,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:20,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:42:20,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:21,964 INFO L124 PetriNetUnfolderBase]: 2633/4067 cut-off events. [2024-06-20 16:42:21,964 INFO L125 PetriNetUnfolderBase]: For 68343/68351 co-relation queries the response was YES. [2024-06-20 16:42:21,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25917 conditions, 4067 events. 2633/4067 cut-off events. For 68343/68351 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 21533 event pairs, 688 based on Foata normal form. 20/4087 useless extension candidates. Maximal degree in co-relation 25851. Up to 3665 conditions per place. [2024-06-20 16:42:21,995 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 221 selfloop transitions, 60 changer transitions 0/285 dead transitions. [2024-06-20 16:42:21,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 285 transitions, 4190 flow [2024-06-20 16:42:21,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:42:21,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:42:21,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:42:21,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-20 16:42:21,996 INFO L175 Difference]: Start difference. First operand has 138 places, 241 transitions, 3386 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:42:21,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 285 transitions, 4190 flow [2024-06-20 16:42:22,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 285 transitions, 3965 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 16:42:22,104 INFO L231 Difference]: Finished difference. Result has 140 places, 245 transitions, 3393 flow [2024-06-20 16:42:22,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3161, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3393, PETRI_PLACES=140, PETRI_TRANSITIONS=245} [2024-06-20 16:42:22,104 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-20 16:42:22,105 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 245 transitions, 3393 flow [2024-06-20 16:42:22,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:22,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:22,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:22,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:42:22,105 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:42:22,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:22,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1255507427, now seen corresponding path program 1 times [2024-06-20 16:42:22,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:22,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087474949] [2024-06-20 16:42:22,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:22,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:25,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:25,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087474949] [2024-06-20 16:42:25,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087474949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:25,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:25,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:42:25,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844952661] [2024-06-20 16:42:25,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:25,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:42:25,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:25,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:42:25,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:42:25,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:42:25,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 245 transitions, 3393 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 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) [2024-06-20 16:42:25,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:25,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:42:25,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:27,009 INFO L124 PetriNetUnfolderBase]: 2721/4142 cut-off events. [2024-06-20 16:42:27,009 INFO L125 PetriNetUnfolderBase]: For 74888/74896 co-relation queries the response was YES. [2024-06-20 16:42:27,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26469 conditions, 4142 events. 2721/4142 cut-off events. For 74888/74896 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21550 event pairs, 617 based on Foata normal form. 26/4168 useless extension candidates. Maximal degree in co-relation 26402. Up to 3577 conditions per place. [2024-06-20 16:42:27,041 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 233 selfloop transitions, 67 changer transitions 0/304 dead transitions. [2024-06-20 16:42:27,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 304 transitions, 4306 flow [2024-06-20 16:42:27,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:42:27,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:42:27,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-20 16:42:27,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-20 16:42:27,043 INFO L175 Difference]: Start difference. First operand has 140 places, 245 transitions, 3393 flow. Second operand 10 states and 186 transitions. [2024-06-20 16:42:27,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 304 transitions, 4306 flow [2024-06-20 16:42:27,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 304 transitions, 4146 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 16:42:27,224 INFO L231 Difference]: Finished difference. Result has 144 places, 248 transitions, 3441 flow [2024-06-20 16:42:27,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3233, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3441, PETRI_PLACES=144, PETRI_TRANSITIONS=248} [2024-06-20 16:42:27,224 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-20 16:42:27,225 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 248 transitions, 3441 flow [2024-06-20 16:42:27,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 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) [2024-06-20 16:42:27,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:27,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:27,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:42:27,225 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:42:27,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:27,226 INFO L85 PathProgramCache]: Analyzing trace with hash -96726037, now seen corresponding path program 5 times [2024-06-20 16:42:27,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:27,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84380349] [2024-06-20 16:42:27,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:27,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:29,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:29,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84380349] [2024-06-20 16:42:29,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84380349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:29,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:29,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:42:29,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459359698] [2024-06-20 16:42:29,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:29,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:42:29,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:29,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:42:29,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:42:29,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:42:29,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 248 transitions, 3441 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:29,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:29,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:42:29,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:31,631 INFO L124 PetriNetUnfolderBase]: 2698/4174 cut-off events. [2024-06-20 16:42:31,632 INFO L125 PetriNetUnfolderBase]: For 75974/75986 co-relation queries the response was YES. [2024-06-20 16:42:31,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26625 conditions, 4174 events. 2698/4174 cut-off events. For 75974/75986 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 22345 event pairs, 541 based on Foata normal form. 22/4196 useless extension candidates. Maximal degree in co-relation 26557. Up to 3524 conditions per place. [2024-06-20 16:42:31,663 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 187 selfloop transitions, 93 changer transitions 0/284 dead transitions. [2024-06-20 16:42:31,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 284 transitions, 4138 flow [2024-06-20 16:42:31,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:42:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:42:31,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 16:42:31,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-20 16:42:31,665 INFO L175 Difference]: Start difference. First operand has 144 places, 248 transitions, 3441 flow. Second operand 7 states and 131 transitions. [2024-06-20 16:42:31,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 284 transitions, 4138 flow [2024-06-20 16:42:31,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 284 transitions, 3902 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-20 16:42:31,813 INFO L231 Difference]: Finished difference. Result has 143 places, 248 transitions, 3433 flow [2024-06-20 16:42:31,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3211, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3433, PETRI_PLACES=143, PETRI_TRANSITIONS=248} [2024-06-20 16:42:31,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-20 16:42:31,813 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 248 transitions, 3433 flow [2024-06-20 16:42:31,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:31,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:31,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:31,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:42:31,814 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:42:31,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:31,814 INFO L85 PathProgramCache]: Analyzing trace with hash 139634021, now seen corresponding path program 2 times [2024-06-20 16:42:31,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:31,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387571328] [2024-06-20 16:42:31,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:31,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:35,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:35,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387571328] [2024-06-20 16:42:35,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387571328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:35,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:35,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:42:35,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106633913] [2024-06-20 16:42:35,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:35,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:42:35,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:35,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:42:35,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:42:35,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:42:35,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 248 transitions, 3433 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 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) [2024-06-20 16:42:35,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:35,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:42:35,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:36,411 INFO L124 PetriNetUnfolderBase]: 2718/4191 cut-off events. [2024-06-20 16:42:36,412 INFO L125 PetriNetUnfolderBase]: For 77764/77797 co-relation queries the response was YES. [2024-06-20 16:42:36,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26763 conditions, 4191 events. 2718/4191 cut-off events. For 77764/77797 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 22199 event pairs, 651 based on Foata normal form. 37/4228 useless extension candidates. Maximal degree in co-relation 26694. Up to 3826 conditions per place. [2024-06-20 16:42:36,447 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 248 selfloop transitions, 29 changer transitions 0/281 dead transitions. [2024-06-20 16:42:36,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 281 transitions, 4117 flow [2024-06-20 16:42:36,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:42:36,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:42:36,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 16:42:36,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-20 16:42:36,449 INFO L175 Difference]: Start difference. First operand has 143 places, 248 transitions, 3433 flow. Second operand 7 states and 120 transitions. [2024-06-20 16:42:36,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 281 transitions, 4117 flow [2024-06-20 16:42:36,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 281 transitions, 3912 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 16:42:36,582 INFO L231 Difference]: Finished difference. Result has 144 places, 250 transitions, 3329 flow [2024-06-20 16:42:36,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3228, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3329, PETRI_PLACES=144, PETRI_TRANSITIONS=250} [2024-06-20 16:42:36,582 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-20 16:42:36,583 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 250 transitions, 3329 flow [2024-06-20 16:42:36,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 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) [2024-06-20 16:42:36,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:36,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:36,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:42:36,583 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:42:36,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:36,584 INFO L85 PathProgramCache]: Analyzing trace with hash 139930691, now seen corresponding path program 3 times [2024-06-20 16:42:36,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:36,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100053708] [2024-06-20 16:42:36,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:36,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:39,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:39,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100053708] [2024-06-20 16:42:39,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100053708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:39,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:39,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:42:39,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389382353] [2024-06-20 16:42:39,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:39,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:42:39,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:39,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:42:39,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:42:39,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:42:39,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 250 transitions, 3329 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 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) [2024-06-20 16:42:39,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:39,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:42:39,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:40,802 INFO L124 PetriNetUnfolderBase]: 2738/4245 cut-off events. [2024-06-20 16:42:40,802 INFO L125 PetriNetUnfolderBase]: For 77392/77425 co-relation queries the response was YES. [2024-06-20 16:42:40,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26854 conditions, 4245 events. 2738/4245 cut-off events. For 77392/77425 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 22720 event pairs, 633 based on Foata normal form. 37/4282 useless extension candidates. Maximal degree in co-relation 26784. Up to 3758 conditions per place. [2024-06-20 16:42:40,833 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 248 selfloop transitions, 36 changer transitions 0/288 dead transitions. [2024-06-20 16:42:40,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 288 transitions, 4171 flow [2024-06-20 16:42:40,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:42:40,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:42:40,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 16:42:40,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-20 16:42:40,835 INFO L175 Difference]: Start difference. First operand has 144 places, 250 transitions, 3329 flow. Second operand 7 states and 122 transitions. [2024-06-20 16:42:40,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 288 transitions, 4171 flow [2024-06-20 16:42:40,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 288 transitions, 4088 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 16:42:40,951 INFO L231 Difference]: Finished difference. Result has 147 places, 255 transitions, 3423 flow [2024-06-20 16:42:40,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3246, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3423, PETRI_PLACES=147, PETRI_TRANSITIONS=255} [2024-06-20 16:42:40,952 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-20 16:42:40,952 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 255 transitions, 3423 flow [2024-06-20 16:42:40,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 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) [2024-06-20 16:42:40,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:40,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:40,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:42:40,953 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:42:40,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:40,954 INFO L85 PathProgramCache]: Analyzing trace with hash -96541339, now seen corresponding path program 4 times [2024-06-20 16:42:40,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:40,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313649933] [2024-06-20 16:42:40,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:40,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:44,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:44,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313649933] [2024-06-20 16:42:44,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313649933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:44,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:44,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:42:44,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274079709] [2024-06-20 16:42:44,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:44,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:42:44,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:44,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:42:44,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:42:44,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:42:44,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 255 transitions, 3423 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:42:44,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:44,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:42:44,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:45,846 INFO L124 PetriNetUnfolderBase]: 2798/4278 cut-off events. [2024-06-20 16:42:45,846 INFO L125 PetriNetUnfolderBase]: For 88033/88045 co-relation queries the response was YES. [2024-06-20 16:42:45,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27617 conditions, 4278 events. 2798/4278 cut-off events. For 88033/88045 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 22564 event pairs, 621 based on Foata normal form. 30/4308 useless extension candidates. Maximal degree in co-relation 27545. Up to 3604 conditions per place. [2024-06-20 16:42:45,882 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 222 selfloop transitions, 72 changer transitions 0/298 dead transitions. [2024-06-20 16:42:45,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 298 transitions, 4229 flow [2024-06-20 16:42:45,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:42:45,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:42:45,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:42:45,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 16:42:45,884 INFO L175 Difference]: Start difference. First operand has 147 places, 255 transitions, 3423 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:42:45,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 298 transitions, 4229 flow [2024-06-20 16:42:46,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 298 transitions, 4139 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-20 16:42:46,026 INFO L231 Difference]: Finished difference. Result has 152 places, 257 transitions, 3545 flow [2024-06-20 16:42:46,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3333, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3545, PETRI_PLACES=152, PETRI_TRANSITIONS=257} [2024-06-20 16:42:46,026 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-20 16:42:46,027 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 257 transitions, 3545 flow [2024-06-20 16:42:46,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:42:46,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:46,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:46,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:42:46,027 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:42:46,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:46,028 INFO L85 PathProgramCache]: Analyzing trace with hash -593441325, now seen corresponding path program 1 times [2024-06-20 16:42:46,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:46,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677207592] [2024-06-20 16:42:46,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:46,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:47,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:47,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677207592] [2024-06-20 16:42:47,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677207592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:47,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:47,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:42:47,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494798103] [2024-06-20 16:42:47,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:47,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:42:47,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:47,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:42:47,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:42:47,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:42:47,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 257 transitions, 3545 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:47,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:47,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:42:47,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:49,287 INFO L124 PetriNetUnfolderBase]: 2742/4239 cut-off events. [2024-06-20 16:42:49,287 INFO L125 PetriNetUnfolderBase]: For 91438/91508 co-relation queries the response was YES. [2024-06-20 16:42:49,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28040 conditions, 4239 events. 2742/4239 cut-off events. For 91438/91508 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 22675 event pairs, 694 based on Foata normal form. 66/4274 useless extension candidates. Maximal degree in co-relation 27966. Up to 3921 conditions per place. [2024-06-20 16:42:49,321 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 251 selfloop transitions, 21 changer transitions 0/285 dead transitions. [2024-06-20 16:42:49,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 285 transitions, 4293 flow [2024-06-20 16:42:49,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:42:49,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:42:49,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-20 16:42:49,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-20 16:42:49,323 INFO L175 Difference]: Start difference. First operand has 152 places, 257 transitions, 3545 flow. Second operand 6 states and 109 transitions. [2024-06-20 16:42:49,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 285 transitions, 4293 flow [2024-06-20 16:42:49,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 285 transitions, 4129 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 16:42:49,470 INFO L231 Difference]: Finished difference. Result has 153 places, 265 transitions, 3554 flow [2024-06-20 16:42:49,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3381, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3554, PETRI_PLACES=153, PETRI_TRANSITIONS=265} [2024-06-20 16:42:49,472 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-20 16:42:49,472 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 265 transitions, 3554 flow [2024-06-20 16:42:49,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:49,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:49,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:49,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:42:49,472 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:42:49,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:49,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1082475288, now seen corresponding path program 1 times [2024-06-20 16:42:49,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:49,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564877485] [2024-06-20 16:42:49,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:49,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:52,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:52,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564877485] [2024-06-20 16:42:52,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564877485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:52,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:52,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:42:52,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597163222] [2024-06-20 16:42:52,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:52,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:42:52,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:52,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:42:52,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:42:52,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:42:52,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 265 transitions, 3554 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:42:52,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:52,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:42:52,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:54,989 INFO L124 PetriNetUnfolderBase]: 3916/6129 cut-off events. [2024-06-20 16:42:54,989 INFO L125 PetriNetUnfolderBase]: For 169041/169053 co-relation queries the response was YES. [2024-06-20 16:42:55,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39628 conditions, 6129 events. 3916/6129 cut-off events. For 169041/169053 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 35394 event pairs, 759 based on Foata normal form. 76/6205 useless extension candidates. Maximal degree in co-relation 39552. Up to 2350 conditions per place. [2024-06-20 16:42:55,043 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 197 selfloop transitions, 168 changer transitions 0/369 dead transitions. [2024-06-20 16:42:55,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 369 transitions, 5169 flow [2024-06-20 16:42:55,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:42:55,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:42:55,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-20 16:42:55,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49783549783549785 [2024-06-20 16:42:55,045 INFO L175 Difference]: Start difference. First operand has 153 places, 265 transitions, 3554 flow. Second operand 11 states and 230 transitions. [2024-06-20 16:42:55,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 369 transitions, 5169 flow [2024-06-20 16:42:55,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 369 transitions, 5110 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-20 16:42:55,270 INFO L231 Difference]: Finished difference. Result has 164 places, 274 transitions, 4118 flow [2024-06-20 16:42:55,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3495, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4118, PETRI_PLACES=164, PETRI_TRANSITIONS=274} [2024-06-20 16:42:55,273 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-20 16:42:55,273 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 274 transitions, 4118 flow [2024-06-20 16:42:55,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:42:55,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:55,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:55,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:42:55,274 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:42:55,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:55,274 INFO L85 PathProgramCache]: Analyzing trace with hash -468013664, now seen corresponding path program 2 times [2024-06-20 16:42:55,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:55,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604413061] [2024-06-20 16:42:55,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:55,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:58,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:58,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604413061] [2024-06-20 16:42:58,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604413061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:58,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:58,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:42:58,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285912804] [2024-06-20 16:42:58,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:58,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:42:58,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:58,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:42:58,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:42:58,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:42:58,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 274 transitions, 4118 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:42:58,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:58,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:42:58,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:01,326 INFO L124 PetriNetUnfolderBase]: 4228/6646 cut-off events. [2024-06-20 16:43:01,327 INFO L125 PetriNetUnfolderBase]: For 198018/198030 co-relation queries the response was YES. [2024-06-20 16:43:01,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43740 conditions, 6646 events. 4228/6646 cut-off events. For 198018/198030 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 39323 event pairs, 1306 based on Foata normal form. 86/6732 useless extension candidates. Maximal degree in co-relation 43660. Up to 4837 conditions per place. [2024-06-20 16:43:01,379 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 182 selfloop transitions, 163 changer transitions 0/349 dead transitions. [2024-06-20 16:43:01,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 349 transitions, 5259 flow [2024-06-20 16:43:01,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:43:01,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:43:01,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 230 transitions. [2024-06-20 16:43:01,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-20 16:43:01,381 INFO L175 Difference]: Start difference. First operand has 164 places, 274 transitions, 4118 flow. Second operand 12 states and 230 transitions. [2024-06-20 16:43:01,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 349 transitions, 5259 flow [2024-06-20 16:43:01,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 349 transitions, 4983 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-20 16:43:01,685 INFO L231 Difference]: Finished difference. Result has 171 places, 276 transitions, 4246 flow [2024-06-20 16:43:01,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3850, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4246, PETRI_PLACES=171, PETRI_TRANSITIONS=276} [2024-06-20 16:43:01,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-20 16:43:01,686 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 276 transitions, 4246 flow [2024-06-20 16:43:01,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:43:01,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:01,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:01,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:43:01,687 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:01,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:01,687 INFO L85 PathProgramCache]: Analyzing trace with hash 449193068, now seen corresponding path program 3 times [2024-06-20 16:43:01,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:01,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385569559] [2024-06-20 16:43:01,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:01,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:43:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:43:05,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:43:05,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385569559] [2024-06-20 16:43:05,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385569559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:43:05,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:43:05,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:43:05,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668555050] [2024-06-20 16:43:05,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:43:05,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:43:05,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:43:05,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:43:05,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:43:05,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:43:05,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 276 transitions, 4246 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:43:05,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:43:05,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:43:05,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:07,921 INFO L124 PetriNetUnfolderBase]: 4781/7545 cut-off events. [2024-06-20 16:43:07,921 INFO L125 PetriNetUnfolderBase]: For 226819/226831 co-relation queries the response was YES. [2024-06-20 16:43:07,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49029 conditions, 7545 events. 4781/7545 cut-off events. For 226819/226831 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 46272 event pairs, 1474 based on Foata normal form. 76/7621 useless extension candidates. Maximal degree in co-relation 48947. Up to 4696 conditions per place. [2024-06-20 16:43:07,986 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 196 selfloop transitions, 167 changer transitions 0/367 dead transitions. [2024-06-20 16:43:07,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 367 transitions, 5606 flow [2024-06-20 16:43:07,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:43:07,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:43:07,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 241 transitions. [2024-06-20 16:43:07,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4781746031746032 [2024-06-20 16:43:07,988 INFO L175 Difference]: Start difference. First operand has 171 places, 276 transitions, 4246 flow. Second operand 12 states and 241 transitions. [2024-06-20 16:43:07,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 367 transitions, 5606 flow [2024-06-20 16:43:08,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 367 transitions, 5237 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-20 16:43:08,370 INFO L231 Difference]: Finished difference. Result has 174 places, 282 transitions, 4369 flow [2024-06-20 16:43:08,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3877, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4369, PETRI_PLACES=174, PETRI_TRANSITIONS=282} [2024-06-20 16:43:08,371 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-20 16:43:08,371 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 282 transitions, 4369 flow [2024-06-20 16:43:08,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:43:08,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:08,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:08,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:43:08,372 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:08,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:08,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1183592310, now seen corresponding path program 4 times [2024-06-20 16:43:08,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:08,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839570] [2024-06-20 16:43:08,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:08,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:43:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:43:11,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:43:11,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839570] [2024-06-20 16:43:11,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:43:11,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:43:11,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:43:11,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628106887] [2024-06-20 16:43:11,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:43:11,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:43:11,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:43:11,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:43:11,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:43:11,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:43:11,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 282 transitions, 4369 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:43:11,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:43:11,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:43:11,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:14,444 INFO L124 PetriNetUnfolderBase]: 5093/8045 cut-off events. [2024-06-20 16:43:14,444 INFO L125 PetriNetUnfolderBase]: For 250090/250098 co-relation queries the response was YES. [2024-06-20 16:43:14,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51679 conditions, 8045 events. 5093/8045 cut-off events. For 250090/250098 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 50025 event pairs, 1817 based on Foata normal form. 82/8127 useless extension candidates. Maximal degree in co-relation 51595. Up to 6706 conditions per place. [2024-06-20 16:43:14,514 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 259 selfloop transitions, 104 changer transitions 0/367 dead transitions. [2024-06-20 16:43:14,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 367 transitions, 5625 flow [2024-06-20 16:43:14,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:43:14,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:43:14,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 246 transitions. [2024-06-20 16:43:14,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2024-06-20 16:43:14,517 INFO L175 Difference]: Start difference. First operand has 174 places, 282 transitions, 4369 flow. Second operand 13 states and 246 transitions. [2024-06-20 16:43:14,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 367 transitions, 5625 flow [2024-06-20 16:43:14,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 367 transitions, 5327 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-20 16:43:14,927 INFO L231 Difference]: Finished difference. Result has 179 places, 284 transitions, 4366 flow [2024-06-20 16:43:14,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4075, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4366, PETRI_PLACES=179, PETRI_TRANSITIONS=284} [2024-06-20 16:43:14,928 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-20 16:43:14,928 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 284 transitions, 4366 flow [2024-06-20 16:43:14,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:43:14,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:14,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:14,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:43:14,929 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:14,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:14,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1188954690, now seen corresponding path program 5 times [2024-06-20 16:43:14,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:14,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867521554] [2024-06-20 16:43:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:14,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:43:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:43:18,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:43:18,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867521554] [2024-06-20 16:43:18,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867521554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:43:18,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:43:18,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:43:18,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862794409] [2024-06-20 16:43:18,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:43:18,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:43:18,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:43:18,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:43:18,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:43:18,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:43:18,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 284 transitions, 4366 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:43:18,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:43:18,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:43:18,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:21,124 INFO L124 PetriNetUnfolderBase]: 5405/8575 cut-off events. [2024-06-20 16:43:21,125 INFO L125 PetriNetUnfolderBase]: For 266195/266203 co-relation queries the response was YES. [2024-06-20 16:43:21,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54309 conditions, 8575 events. 5405/8575 cut-off events. For 266195/266203 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 54550 event pairs, 1971 based on Foata normal form. 82/8657 useless extension candidates. Maximal degree in co-relation 54223. Up to 7230 conditions per place. [2024-06-20 16:43:21,189 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 255 selfloop transitions, 100 changer transitions 0/359 dead transitions. [2024-06-20 16:43:21,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 359 transitions, 5588 flow [2024-06-20 16:43:21,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:43:21,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:43:21,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-20 16:43:21,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-06-20 16:43:21,191 INFO L175 Difference]: Start difference. First operand has 179 places, 284 transitions, 4366 flow. Second operand 11 states and 214 transitions. [2024-06-20 16:43:21,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 359 transitions, 5588 flow [2024-06-20 16:43:21,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 359 transitions, 5334 flow, removed 28 selfloop flow, removed 11 redundant places. [2024-06-20 16:43:21,644 INFO L231 Difference]: Finished difference. Result has 179 places, 286 transitions, 4399 flow [2024-06-20 16:43:21,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4112, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4399, PETRI_PLACES=179, PETRI_TRANSITIONS=286} [2024-06-20 16:43:21,644 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-20 16:43:21,645 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 286 transitions, 4399 flow [2024-06-20 16:43:21,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:43:21,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:21,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:21,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:43:21,645 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:21,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:21,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1714850554, now seen corresponding path program 6 times [2024-06-20 16:43:21,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:21,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600102300] [2024-06-20 16:43:21,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:21,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:43:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:43:24,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:43:24,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600102300] [2024-06-20 16:43:24,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600102300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:43:24,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:43:24,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:43:24,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550154459] [2024-06-20 16:43:24,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:43:24,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:43:24,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:43:24,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:43:24,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:43:24,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:43:24,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 286 transitions, 4399 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:43:24,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:43:24,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:43:24,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:27,702 INFO L124 PetriNetUnfolderBase]: 5974/9492 cut-off events. [2024-06-20 16:43:27,702 INFO L125 PetriNetUnfolderBase]: For 304846/304854 co-relation queries the response was YES. [2024-06-20 16:43:27,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59792 conditions, 9492 events. 5974/9492 cut-off events. For 304846/304854 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 61779 event pairs, 2019 based on Foata normal form. 72/9564 useless extension candidates. Maximal degree in co-relation 59705. Up to 6532 conditions per place. [2024-06-20 16:43:27,791 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 272 selfloop transitions, 99 changer transitions 0/375 dead transitions. [2024-06-20 16:43:27,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 375 transitions, 5872 flow [2024-06-20 16:43:27,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:43:27,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:43:27,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-20 16:43:27,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2024-06-20 16:43:27,793 INFO L175 Difference]: Start difference. First operand has 179 places, 286 transitions, 4399 flow. Second operand 11 states and 219 transitions. [2024-06-20 16:43:27,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 375 transitions, 5872 flow [2024-06-20 16:43:28,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 375 transitions, 5624 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-20 16:43:28,367 INFO L231 Difference]: Finished difference. Result has 182 places, 293 transitions, 4561 flow [2024-06-20 16:43:28,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4151, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4561, PETRI_PLACES=182, PETRI_TRANSITIONS=293} [2024-06-20 16:43:28,368 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-20 16:43:28,368 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 293 transitions, 4561 flow [2024-06-20 16:43:28,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:43:28,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:28,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:28,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:43:28,369 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:28,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:28,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1183377108, now seen corresponding path program 1 times [2024-06-20 16:43:28,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:28,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629360479] [2024-06-20 16:43:28,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:28,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:43:31,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:43:32,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:43:32,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629360479] [2024-06-20 16:43:32,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629360479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:43:32,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:43:32,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:43:32,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801885959] [2024-06-20 16:43:32,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:43:32,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:43:32,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:43:32,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:43:32,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:43:32,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:43:32,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 293 transitions, 4561 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:32,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:43:32,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:43:32,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:35,214 INFO L124 PetriNetUnfolderBase]: 6186/9906 cut-off events. [2024-06-20 16:43:35,215 INFO L125 PetriNetUnfolderBase]: For 316886/316894 co-relation queries the response was YES. [2024-06-20 16:43:35,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61760 conditions, 9906 events. 6186/9906 cut-off events. For 316886/316894 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 65748 event pairs, 2253 based on Foata normal form. 62/9968 useless extension candidates. Maximal degree in co-relation 61671. Up to 7457 conditions per place. [2024-06-20 16:43:35,309 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 268 selfloop transitions, 112 changer transitions 0/384 dead transitions. [2024-06-20 16:43:35,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 384 transitions, 5912 flow [2024-06-20 16:43:35,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:43:35,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:43:35,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 250 transitions. [2024-06-20 16:43:35,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45787545787545786 [2024-06-20 16:43:35,311 INFO L175 Difference]: Start difference. First operand has 182 places, 293 transitions, 4561 flow. Second operand 13 states and 250 transitions. [2024-06-20 16:43:35,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 384 transitions, 5912 flow [2024-06-20 16:43:36,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 384 transitions, 5710 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-20 16:43:36,038 INFO L231 Difference]: Finished difference. Result has 188 places, 295 transitions, 4669 flow [2024-06-20 16:43:36,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4359, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4669, PETRI_PLACES=188, PETRI_TRANSITIONS=295} [2024-06-20 16:43:36,038 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-20 16:43:36,039 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 295 transitions, 4669 flow [2024-06-20 16:43:36,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:36,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:36,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:36,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:43:36,039 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:36,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:36,040 INFO L85 PathProgramCache]: Analyzing trace with hash -223026290, now seen corresponding path program 7 times [2024-06-20 16:43:36,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:36,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800695823] [2024-06-20 16:43:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:36,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:43:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:43:39,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:43:39,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800695823] [2024-06-20 16:43:39,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800695823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:43:39,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:43:39,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:43:39,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224038740] [2024-06-20 16:43:39,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:43:39,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:43:39,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:43:39,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:43:39,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:43:39,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:43:39,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 295 transitions, 4669 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:43:39,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:43:39,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:43:39,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:42,272 INFO L124 PetriNetUnfolderBase]: 6218/9986 cut-off events. [2024-06-20 16:43:42,273 INFO L125 PetriNetUnfolderBase]: For 309976/310009 co-relation queries the response was YES. [2024-06-20 16:43:42,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62316 conditions, 9986 events. 6218/9986 cut-off events. For 309976/310009 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 66702 event pairs, 2596 based on Foata normal form. 53/10039 useless extension candidates. Maximal degree in co-relation 62225. Up to 9195 conditions per place. [2024-06-20 16:43:42,357 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 287 selfloop transitions, 61 changer transitions 0/352 dead transitions. [2024-06-20 16:43:42,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 352 transitions, 5583 flow [2024-06-20 16:43:42,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:43:42,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:43:42,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-20 16:43:42,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:43:42,359 INFO L175 Difference]: Start difference. First operand has 188 places, 295 transitions, 4669 flow. Second operand 10 states and 175 transitions. [2024-06-20 16:43:42,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 352 transitions, 5583 flow [2024-06-20 16:43:42,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 352 transitions, 5293 flow, removed 34 selfloop flow, removed 11 redundant places. [2024-06-20 16:43:42,852 INFO L231 Difference]: Finished difference. Result has 187 places, 296 transitions, 4542 flow [2024-06-20 16:43:42,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4381, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4542, PETRI_PLACES=187, PETRI_TRANSITIONS=296} [2024-06-20 16:43:42,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-20 16:43:42,853 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 296 transitions, 4542 flow [2024-06-20 16:43:42,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:43:42,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:42,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:42,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:43:42,854 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:42,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:42,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1296610272, now seen corresponding path program 8 times [2024-06-20 16:43:42,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:42,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406810692] [2024-06-20 16:43:42,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:42,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:43:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:43:45,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:43:45,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406810692] [2024-06-20 16:43:45,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406810692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:43:45,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:43:45,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:43:45,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757465242] [2024-06-20 16:43:45,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:43:45,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:43:45,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:43:45,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:43:45,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:43:45,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:43:45,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 296 transitions, 4542 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:43:45,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:43:45,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:43:45,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:49,163 INFO L124 PetriNetUnfolderBase]: 6718/10846 cut-off events. [2024-06-20 16:43:49,163 INFO L125 PetriNetUnfolderBase]: For 362547/362559 co-relation queries the response was YES. [2024-06-20 16:43:49,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65545 conditions, 10846 events. 6718/10846 cut-off events. For 362547/362559 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 74058 event pairs, 2653 based on Foata normal form. 86/10932 useless extension candidates. Maximal degree in co-relation 65453. Up to 8702 conditions per place. [2024-06-20 16:43:49,264 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 219 selfloop transitions, 139 changer transitions 0/362 dead transitions. [2024-06-20 16:43:49,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 362 transitions, 5675 flow [2024-06-20 16:43:49,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:43:49,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:43:49,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-20 16:43:49,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2024-06-20 16:43:49,265 INFO L175 Difference]: Start difference. First operand has 187 places, 296 transitions, 4542 flow. Second operand 10 states and 199 transitions. [2024-06-20 16:43:49,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 362 transitions, 5675 flow [2024-06-20 16:43:49,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 362 transitions, 5528 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 16:43:49,817 INFO L231 Difference]: Finished difference. Result has 189 places, 298 transitions, 4774 flow [2024-06-20 16:43:49,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4395, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4774, PETRI_PLACES=189, PETRI_TRANSITIONS=298} [2024-06-20 16:43:49,818 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-20 16:43:49,818 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 298 transitions, 4774 flow [2024-06-20 16:43:49,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:43:49,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:49,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:49,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:43:49,819 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:49,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:49,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1301972652, now seen corresponding path program 9 times [2024-06-20 16:43:49,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:49,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400034603] [2024-06-20 16:43:49,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:49,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:43:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:43:52,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:43:52,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400034603] [2024-06-20 16:43:52,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400034603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:43:52,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:43:52,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:43:52,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646462292] [2024-06-20 16:43:52,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:43:52,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:43:52,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:43:52,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:43:52,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:43:52,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:43:52,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 298 transitions, 4774 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:43:52,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:43:52,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:43:52,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:56,284 INFO L124 PetriNetUnfolderBase]: 7177/11609 cut-off events. [2024-06-20 16:43:56,285 INFO L125 PetriNetUnfolderBase]: For 387328/387340 co-relation queries the response was YES. [2024-06-20 16:43:56,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69194 conditions, 11609 events. 7177/11609 cut-off events. For 387328/387340 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 80646 event pairs, 2872 based on Foata normal form. 86/11695 useless extension candidates. Maximal degree in co-relation 69101. Up to 9483 conditions per place. [2024-06-20 16:43:56,411 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 212 selfloop transitions, 143 changer transitions 0/359 dead transitions. [2024-06-20 16:43:56,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 359 transitions, 5825 flow [2024-06-20 16:43:56,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:43:56,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:43:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-20 16:43:56,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-20 16:43:56,413 INFO L175 Difference]: Start difference. First operand has 189 places, 298 transitions, 4774 flow. Second operand 10 states and 192 transitions. [2024-06-20 16:43:56,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 359 transitions, 5825 flow [2024-06-20 16:43:57,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 359 transitions, 5499 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-20 16:43:57,233 INFO L231 Difference]: Finished difference. Result has 191 places, 300 transitions, 4839 flow [2024-06-20 16:43:57,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4448, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4839, PETRI_PLACES=191, PETRI_TRANSITIONS=300} [2024-06-20 16:43:57,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-20 16:43:57,234 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 300 transitions, 4839 flow [2024-06-20 16:43:57,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:43:57,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:57,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:57,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:43:57,234 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:57,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:57,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1296462402, now seen corresponding path program 10 times [2024-06-20 16:43:57,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:57,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778656797] [2024-06-20 16:43:57,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:57,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:44:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:44:00,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:44:00,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778656797] [2024-06-20 16:44:00,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778656797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:44:00,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:44:00,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:44:00,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502453296] [2024-06-20 16:44:00,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:44:00,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:44:00,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:44:00,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:44:00,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:44:00,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:44:00,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 300 transitions, 4839 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:44:00,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:44:00,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:44:00,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:44:03,960 INFO L124 PetriNetUnfolderBase]: 7522/12215 cut-off events. [2024-06-20 16:44:03,960 INFO L125 PetriNetUnfolderBase]: For 388838/388850 co-relation queries the response was YES. [2024-06-20 16:44:04,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70560 conditions, 12215 events. 7522/12215 cut-off events. For 388838/388850 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 86044 event pairs, 2278 based on Foata normal form. 76/12291 useless extension candidates. Maximal degree in co-relation 70466. Up to 6712 conditions per place. [2024-06-20 16:44:04,071 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 222 selfloop transitions, 154 changer transitions 0/380 dead transitions. [2024-06-20 16:44:04,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 380 transitions, 6237 flow [2024-06-20 16:44:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:44:04,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:44:04,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-20 16:44:04,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-20 16:44:04,073 INFO L175 Difference]: Start difference. First operand has 191 places, 300 transitions, 4839 flow. Second operand 10 states and 205 transitions. [2024-06-20 16:44:04,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 380 transitions, 6237 flow [2024-06-20 16:44:04,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 380 transitions, 5899 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-20 16:44:04,844 INFO L231 Difference]: Finished difference. Result has 194 places, 306 transitions, 5053 flow [2024-06-20 16:44:04,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4501, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5053, PETRI_PLACES=194, PETRI_TRANSITIONS=306} [2024-06-20 16:44:04,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-20 16:44:04,844 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 306 transitions, 5053 flow [2024-06-20 16:44:04,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:44:04,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:44:04,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:44:04,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:44:04,845 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:44:04,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:44:04,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1302187854, now seen corresponding path program 2 times [2024-06-20 16:44:04,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:44:04,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296941315] [2024-06-20 16:44:04,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:44:04,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:44:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:44:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:44:08,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:44:08,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296941315] [2024-06-20 16:44:08,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296941315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:44:08,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:44:08,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:44:08,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961780652] [2024-06-20 16:44:08,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:44:08,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:44:08,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:44:08,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:44:08,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:44:08,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:44:08,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 306 transitions, 5053 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 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) [2024-06-20 16:44:08,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:44:08,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:44:08,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:44:11,806 INFO L124 PetriNetUnfolderBase]: 7938/13004 cut-off events. [2024-06-20 16:44:11,807 INFO L125 PetriNetUnfolderBase]: For 406846/406858 co-relation queries the response was YES. [2024-06-20 16:44:11,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74157 conditions, 13004 events. 7938/13004 cut-off events. For 406846/406858 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 94047 event pairs, 2957 based on Foata normal form. 66/13070 useless extension candidates. Maximal degree in co-relation 74061. Up to 8734 conditions per place. [2024-06-20 16:44:11,978 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 215 selfloop transitions, 155 changer transitions 0/374 dead transitions. [2024-06-20 16:44:11,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 374 transitions, 6193 flow [2024-06-20 16:44:11,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:44:11,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:44:11,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-20 16:44:11,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-20 16:44:11,980 INFO L175 Difference]: Start difference. First operand has 194 places, 306 transitions, 5053 flow. Second operand 10 states and 196 transitions. [2024-06-20 16:44:11,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 374 transitions, 6193 flow [2024-06-20 16:44:13,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 374 transitions, 5709 flow, removed 46 selfloop flow, removed 9 redundant places. [2024-06-20 16:44:13,101 INFO L231 Difference]: Finished difference. Result has 196 places, 309 transitions, 5039 flow [2024-06-20 16:44:13,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4569, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5039, PETRI_PLACES=196, PETRI_TRANSITIONS=309} [2024-06-20 16:44:13,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-20 16:44:13,117 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 309 transitions, 5039 flow [2024-06-20 16:44:13,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 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) [2024-06-20 16:44:13,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:44:13,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:44:13,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:44:13,118 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:44:13,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:44:13,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1460561912, now seen corresponding path program 3 times [2024-06-20 16:44:13,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:44:13,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452756123] [2024-06-20 16:44:13,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:44:13,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:44:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:44:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:44:16,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:44:16,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452756123] [2024-06-20 16:44:16,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452756123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:44:16,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:44:16,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:44:16,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994145792] [2024-06-20 16:44:16,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:44:16,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:44:16,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:44:16,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:44:16,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:44:16,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:44:16,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 309 transitions, 5039 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 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) [2024-06-20 16:44:16,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:44:16,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:44:16,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:44:20,181 INFO L124 PetriNetUnfolderBase]: 7986/13120 cut-off events. [2024-06-20 16:44:20,181 INFO L125 PetriNetUnfolderBase]: For 389634/389667 co-relation queries the response was YES. [2024-06-20 16:44:20,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74022 conditions, 13120 events. 7986/13120 cut-off events. For 389634/389667 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 95437 event pairs, 3697 based on Foata normal form. 45/13165 useless extension candidates. Maximal degree in co-relation 73925. Up to 12105 conditions per place. [2024-06-20 16:44:20,276 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 306 selfloop transitions, 64 changer transitions 0/374 dead transitions. [2024-06-20 16:44:20,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 374 transitions, 6027 flow [2024-06-20 16:44:20,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:44:20,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:44:20,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-20 16:44:20,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-20 16:44:20,278 INFO L175 Difference]: Start difference. First operand has 196 places, 309 transitions, 5039 flow. Second operand 11 states and 192 transitions. [2024-06-20 16:44:20,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 374 transitions, 6027 flow [2024-06-20 16:44:21,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 374 transitions, 5691 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-20 16:44:21,204 INFO L231 Difference]: Finished difference. Result has 200 places, 310 transitions, 4873 flow [2024-06-20 16:44:21,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4703, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4873, PETRI_PLACES=200, PETRI_TRANSITIONS=310} [2024-06-20 16:44:21,204 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-20 16:44:21,204 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 310 transitions, 4873 flow [2024-06-20 16:44:21,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 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) [2024-06-20 16:44:21,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:44:21,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:44:21,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:44:21,205 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:44:21,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:44:21,205 INFO L85 PathProgramCache]: Analyzing trace with hash 42886192, now seen corresponding path program 4 times [2024-06-20 16:44:21,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:44:21,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558371422] [2024-06-20 16:44:21,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:44:21,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:44:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:44:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:44:24,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:44:24,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558371422] [2024-06-20 16:44:24,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558371422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:44:24,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:44:24,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:44:24,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020321184] [2024-06-20 16:44:24,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:44:24,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:44:24,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:44:24,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:44:24,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:44:24,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:44:24,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 310 transitions, 4873 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 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) [2024-06-20 16:44:24,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:44:24,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:44:24,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:44:28,023 INFO L124 PetriNetUnfolderBase]: 7966/13088 cut-off events. [2024-06-20 16:44:28,023 INFO L125 PetriNetUnfolderBase]: For 389271/389304 co-relation queries the response was YES. [2024-06-20 16:44:28,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73117 conditions, 13088 events. 7966/13088 cut-off events. For 389271/389304 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 94821 event pairs, 3639 based on Foata normal form. 45/13133 useless extension candidates. Maximal degree in co-relation 73019. Up to 11143 conditions per place. [2024-06-20 16:44:28,151 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 288 selfloop transitions, 75 changer transitions 0/367 dead transitions. [2024-06-20 16:44:28,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 367 transitions, 5719 flow [2024-06-20 16:44:28,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:44:28,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:44:28,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-20 16:44:28,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:44:28,157 INFO L175 Difference]: Start difference. First operand has 200 places, 310 transitions, 4873 flow. Second operand 10 states and 175 transitions. [2024-06-20 16:44:28,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 367 transitions, 5719 flow [2024-06-20 16:44:29,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 367 transitions, 5561 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-20 16:44:29,051 INFO L231 Difference]: Finished difference. Result has 200 places, 309 transitions, 4791 flow [2024-06-20 16:44:29,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4637, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4791, PETRI_PLACES=200, PETRI_TRANSITIONS=309} [2024-06-20 16:44:29,051 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-20 16:44:29,052 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 309 transitions, 4791 flow [2024-06-20 16:44:29,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 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) [2024-06-20 16:44:29,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:44:29,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:44:29,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:44:29,052 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:44:29,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:44:29,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1488867136, now seen corresponding path program 1 times [2024-06-20 16:44:29,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:44:29,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065893748] [2024-06-20 16:44:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:44:29,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:44:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:44:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:44:32,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:44:32,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065893748] [2024-06-20 16:44:32,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065893748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:44:32,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:44:32,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:44:32,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999313711] [2024-06-20 16:44:32,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:44:32,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:44:32,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:44:32,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:44:32,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:44:32,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:44:32,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 309 transitions, 4791 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:32,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:44:32,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:44:32,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:44:35,230 INFO L124 PetriNetUnfolderBase]: 8004/13107 cut-off events. [2024-06-20 16:44:35,230 INFO L125 PetriNetUnfolderBase]: For 414264/414346 co-relation queries the response was YES. [2024-06-20 16:44:35,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74543 conditions, 13107 events. 8004/13107 cut-off events. For 414264/414346 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 95165 event pairs, 3706 based on Foata normal form. 70/13127 useless extension candidates. Maximal degree in co-relation 74444. Up to 12528 conditions per place. [2024-06-20 16:44:35,361 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 282 selfloop transitions, 59 changer transitions 9/365 dead transitions. [2024-06-20 16:44:35,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 365 transitions, 6078 flow [2024-06-20 16:44:35,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:44:35,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:44:35,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:44:35,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 16:44:35,363 INFO L175 Difference]: Start difference. First operand has 200 places, 309 transitions, 4791 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:44:35,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 365 transitions, 6078 flow [2024-06-20 16:44:36,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 365 transitions, 5894 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 16:44:36,213 INFO L231 Difference]: Finished difference. Result has 202 places, 331 transitions, 5176 flow [2024-06-20 16:44:36,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4618, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5176, PETRI_PLACES=202, PETRI_TRANSITIONS=331} [2024-06-20 16:44:36,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-20 16:44:36,214 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 331 transitions, 5176 flow [2024-06-20 16:44:36,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:36,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:44:36,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:44:36,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:44:36,214 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:44:36,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:44:36,215 INFO L85 PathProgramCache]: Analyzing trace with hash 933174964, now seen corresponding path program 2 times [2024-06-20 16:44:36,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:44:36,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632588126] [2024-06-20 16:44:36,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:44:36,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:44:36,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:44:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:44:39,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:44:39,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632588126] [2024-06-20 16:44:39,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632588126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:44:39,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:44:39,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:44:39,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309934921] [2024-06-20 16:44:39,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:44:39,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:44:39,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:44:39,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:44:39,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:44:39,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:44:39,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 331 transitions, 5176 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:39,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:44:39,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:44:39,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:44:42,061 INFO L124 PetriNetUnfolderBase]: 7536/12235 cut-off events. [2024-06-20 16:44:42,061 INFO L125 PetriNetUnfolderBase]: For 411358/411440 co-relation queries the response was YES. [2024-06-20 16:44:42,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69746 conditions, 12235 events. 7536/12235 cut-off events. For 411358/411440 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 86835 event pairs, 3385 based on Foata normal form. 70/12258 useless extension candidates. Maximal degree in co-relation 69646. Up to 11606 conditions per place. [2024-06-20 16:44:42,203 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 252 selfloop transitions, 78 changer transitions 15/360 dead transitions. [2024-06-20 16:44:42,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 360 transitions, 5950 flow [2024-06-20 16:44:42,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:44:42,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:44:42,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 16:44:42,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-20 16:44:42,205 INFO L175 Difference]: Start difference. First operand has 202 places, 331 transitions, 5176 flow. Second operand 7 states and 128 transitions. [2024-06-20 16:44:42,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 360 transitions, 5950 flow [2024-06-20 16:44:43,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 360 transitions, 5821 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-20 16:44:43,303 INFO L231 Difference]: Finished difference. Result has 205 places, 317 transitions, 4996 flow [2024-06-20 16:44:43,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5047, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4996, PETRI_PLACES=205, PETRI_TRANSITIONS=317} [2024-06-20 16:44:43,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-20 16:44:43,304 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 317 transitions, 4996 flow [2024-06-20 16:44:43,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:43,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:44:43,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:44:43,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:44:43,305 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:44:43,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:44:43,305 INFO L85 PathProgramCache]: Analyzing trace with hash 933590674, now seen corresponding path program 3 times [2024-06-20 16:44:43,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:44:43,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7508346] [2024-06-20 16:44:43,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:44:43,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:44:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:44:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:44:46,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:44:46,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7508346] [2024-06-20 16:44:46,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7508346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:44:46,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:44:46,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:44:46,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670001549] [2024-06-20 16:44:46,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:44:46,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:44:46,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:44:46,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:44:46,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:44:46,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:44:46,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 317 transitions, 4996 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:46,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:44:46,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:44:46,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:44:49,006 INFO L124 PetriNetUnfolderBase]: 6622/10714 cut-off events. [2024-06-20 16:44:49,007 INFO L125 PetriNetUnfolderBase]: For 417227/417320 co-relation queries the response was YES. [2024-06-20 16:44:49,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64917 conditions, 10714 events. 6622/10714 cut-off events. For 417227/417320 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 73609 event pairs, 2554 based on Foata normal form. 78/10743 useless extension candidates. Maximal degree in co-relation 64817. Up to 9946 conditions per place. [2024-06-20 16:44:49,092 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 242 selfloop transitions, 97 changer transitions 0/354 dead transitions. [2024-06-20 16:44:49,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 354 transitions, 6112 flow [2024-06-20 16:44:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:44:49,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:44:49,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-20 16:44:49,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-20 16:44:49,093 INFO L175 Difference]: Start difference. First operand has 205 places, 317 transitions, 4996 flow. Second operand 7 states and 127 transitions. [2024-06-20 16:44:49,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 354 transitions, 6112 flow [2024-06-20 16:44:49,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 354 transitions, 5722 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-20 16:44:49,695 INFO L231 Difference]: Finished difference. Result has 202 places, 328 transitions, 5071 flow [2024-06-20 16:44:49,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4622, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5071, PETRI_PLACES=202, PETRI_TRANSITIONS=328} [2024-06-20 16:44:49,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-20 16:44:49,696 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 328 transitions, 5071 flow [2024-06-20 16:44:49,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:49,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:44:49,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:44:49,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:44:49,697 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:44:49,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:44:49,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1260160954, now seen corresponding path program 1 times [2024-06-20 16:44:49,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:44:49,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841952849] [2024-06-20 16:44:49,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:44:49,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:44:49,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:44:51,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:44:51,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:44:51,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841952849] [2024-06-20 16:44:51,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841952849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:44:51,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:44:51,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:44:51,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928368178] [2024-06-20 16:44:51,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:44:51,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:44:51,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:44:51,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:44:51,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:44:52,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:44:52,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 328 transitions, 5071 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:52,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:44:52,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:44:52,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:44:54,800 INFO L124 PetriNetUnfolderBase]: 6755/10898 cut-off events. [2024-06-20 16:44:54,801 INFO L125 PetriNetUnfolderBase]: For 380166/380170 co-relation queries the response was YES. [2024-06-20 16:44:54,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65577 conditions, 10898 events. 6755/10898 cut-off events. For 380166/380170 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 74672 event pairs, 2946 based on Foata normal form. 4/10902 useless extension candidates. Maximal degree in co-relation 65478. Up to 10546 conditions per place. [2024-06-20 16:44:54,921 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 328 selfloop transitions, 25 changer transitions 0/357 dead transitions. [2024-06-20 16:44:54,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 357 transitions, 6121 flow [2024-06-20 16:44:54,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:44:54,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:44:54,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-20 16:44:54,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-20 16:44:54,937 INFO L175 Difference]: Start difference. First operand has 202 places, 328 transitions, 5071 flow. Second operand 6 states and 107 transitions. [2024-06-20 16:44:54,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 357 transitions, 6121 flow [2024-06-20 16:44:55,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 357 transitions, 6000 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-20 16:44:55,889 INFO L231 Difference]: Finished difference. Result has 207 places, 334 transitions, 5146 flow [2024-06-20 16:44:55,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4958, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5146, PETRI_PLACES=207, PETRI_TRANSITIONS=334} [2024-06-20 16:44:55,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-20 16:44:55,899 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 334 transitions, 5146 flow [2024-06-20 16:44:55,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:55,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:44:55,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:44:55,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:44:55,900 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:44:55,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:44:55,900 INFO L85 PathProgramCache]: Analyzing trace with hash 267409944, now seen corresponding path program 2 times [2024-06-20 16:44:55,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:44:55,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406635119] [2024-06-20 16:44:55,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:44:55,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:44:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:44:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:44:58,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:44:58,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406635119] [2024-06-20 16:44:58,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406635119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:44:58,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:44:58,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:44:58,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915541350] [2024-06-20 16:44:58,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:44:58,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:44:58,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:44:58,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:44:58,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:44:58,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:44:58,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 334 transitions, 5146 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:58,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:44:58,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:44:58,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:00,895 INFO L124 PetriNetUnfolderBase]: 6721/10846 cut-off events. [2024-06-20 16:45:00,896 INFO L125 PetriNetUnfolderBase]: For 391433/391437 co-relation queries the response was YES. [2024-06-20 16:45:00,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65413 conditions, 10846 events. 6721/10846 cut-off events. For 391433/391437 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 74245 event pairs, 2935 based on Foata normal form. 8/10854 useless extension candidates. Maximal degree in co-relation 65311. Up to 10547 conditions per place. [2024-06-20 16:45:00,990 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 329 selfloop transitions, 21 changer transitions 0/354 dead transitions. [2024-06-20 16:45:00,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 354 transitions, 5908 flow [2024-06-20 16:45:00,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:45:00,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:45:00,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-20 16:45:00,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-20 16:45:00,991 INFO L175 Difference]: Start difference. First operand has 207 places, 334 transitions, 5146 flow. Second operand 6 states and 104 transitions. [2024-06-20 16:45:00,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 354 transitions, 5908 flow [2024-06-20 16:45:01,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 354 transitions, 5804 flow, removed 51 selfloop flow, removed 1 redundant places. [2024-06-20 16:45:01,749 INFO L231 Difference]: Finished difference. Result has 212 places, 334 transitions, 5096 flow [2024-06-20 16:45:01,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5042, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5096, PETRI_PLACES=212, PETRI_TRANSITIONS=334} [2024-06-20 16:45:01,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-20 16:45:01,750 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 334 transitions, 5096 flow [2024-06-20 16:45:01,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:01,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:01,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:01,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:45:01,751 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:01,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:01,751 INFO L85 PathProgramCache]: Analyzing trace with hash 933605554, now seen corresponding path program 1 times [2024-06-20 16:45:01,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:01,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461891768] [2024-06-20 16:45:01,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:01,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:04,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:04,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461891768] [2024-06-20 16:45:04,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461891768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:04,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:04,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:45:04,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374217187] [2024-06-20 16:45:04,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:04,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:45:04,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:04,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:45:04,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:45:04,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:45:04,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 334 transitions, 5096 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 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) [2024-06-20 16:45:04,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:04,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:45:04,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:07,465 INFO L124 PetriNetUnfolderBase]: 6614/10697 cut-off events. [2024-06-20 16:45:07,465 INFO L125 PetriNetUnfolderBase]: For 417819/417927 co-relation queries the response was YES. [2024-06-20 16:45:07,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64963 conditions, 10697 events. 6614/10697 cut-off events. For 417819/417927 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 73330 event pairs, 2878 based on Foata normal form. 95/10747 useless extension candidates. Maximal degree in co-relation 64858. Up to 10292 conditions per place. [2024-06-20 16:45:07,596 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 324 selfloop transitions, 23 changer transitions 0/362 dead transitions. [2024-06-20 16:45:07,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 362 transitions, 5918 flow [2024-06-20 16:45:07,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:45:07,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:45:07,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 16:45:07,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-20 16:45:07,606 INFO L175 Difference]: Start difference. First operand has 212 places, 334 transitions, 5096 flow. Second operand 7 states and 124 transitions. [2024-06-20 16:45:07,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 362 transitions, 5918 flow [2024-06-20 16:45:08,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 362 transitions, 5866 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 16:45:08,560 INFO L231 Difference]: Finished difference. Result has 213 places, 336 transitions, 5142 flow [2024-06-20 16:45:08,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5044, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5142, PETRI_PLACES=213, PETRI_TRANSITIONS=336} [2024-06-20 16:45:08,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-20 16:45:08,561 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 336 transitions, 5142 flow [2024-06-20 16:45:08,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 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) [2024-06-20 16:45:08,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:08,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:08,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:45:08,561 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:08,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:08,562 INFO L85 PathProgramCache]: Analyzing trace with hash -797084803, now seen corresponding path program 1 times [2024-06-20 16:45:08,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:08,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920755862] [2024-06-20 16:45:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:08,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:11,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:11,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920755862] [2024-06-20 16:45:11,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920755862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:11,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:11,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:45:11,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371633770] [2024-06-20 16:45:11,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:11,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:45:11,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:11,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:45:11,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:45:11,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:45:11,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 336 transitions, 5142 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:11,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:11,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:45:11,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:14,735 INFO L124 PetriNetUnfolderBase]: 6775/10925 cut-off events. [2024-06-20 16:45:14,735 INFO L125 PetriNetUnfolderBase]: For 416803/416809 co-relation queries the response was YES. [2024-06-20 16:45:14,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66526 conditions, 10925 events. 6775/10925 cut-off events. For 416803/416809 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 74930 event pairs, 2929 based on Foata normal form. 8/10933 useless extension candidates. Maximal degree in co-relation 66420. Up to 10618 conditions per place. [2024-06-20 16:45:14,854 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 339 selfloop transitions, 35 changer transitions 0/378 dead transitions. [2024-06-20 16:45:14,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 378 transitions, 6137 flow [2024-06-20 16:45:14,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:45:14,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:45:14,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:45:14,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 16:45:14,856 INFO L175 Difference]: Start difference. First operand has 213 places, 336 transitions, 5142 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:45:14,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 378 transitions, 6137 flow [2024-06-20 16:45:15,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 378 transitions, 6063 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 16:45:15,893 INFO L231 Difference]: Finished difference. Result has 217 places, 345 transitions, 5306 flow [2024-06-20 16:45:15,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5068, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5306, PETRI_PLACES=217, PETRI_TRANSITIONS=345} [2024-06-20 16:45:15,894 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-20 16:45:15,894 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 345 transitions, 5306 flow [2024-06-20 16:45:15,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:15,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:15,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:15,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:45:15,894 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:15,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:15,895 INFO L85 PathProgramCache]: Analyzing trace with hash -787819213, now seen corresponding path program 2 times [2024-06-20 16:45:15,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:15,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596316063] [2024-06-20 16:45:15,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:15,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:19,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:19,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596316063] [2024-06-20 16:45:19,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596316063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:19,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:19,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:45:19,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127663668] [2024-06-20 16:45:19,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:19,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:45:19,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:19,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:45:19,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:45:19,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:45:19,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 345 transitions, 5306 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:19,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:19,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:45:19,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:21,683 INFO L124 PetriNetUnfolderBase]: 6806/10966 cut-off events. [2024-06-20 16:45:21,683 INFO L125 PetriNetUnfolderBase]: For 434965/434967 co-relation queries the response was YES. [2024-06-20 16:45:21,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67320 conditions, 10966 events. 6806/10966 cut-off events. For 434965/434967 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 75013 event pairs, 2930 based on Foata normal form. 2/10968 useless extension candidates. Maximal degree in co-relation 67212. Up to 10633 conditions per place. [2024-06-20 16:45:21,806 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 336 selfloop transitions, 44 changer transitions 0/384 dead transitions. [2024-06-20 16:45:21,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 384 transitions, 6441 flow [2024-06-20 16:45:21,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:45:21,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:45:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 16:45:21,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 16:45:21,808 INFO L175 Difference]: Start difference. First operand has 217 places, 345 transitions, 5306 flow. Second operand 8 states and 128 transitions. [2024-06-20 16:45:21,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 384 transitions, 6441 flow [2024-06-20 16:45:22,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 384 transitions, 6353 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 16:45:22,765 INFO L231 Difference]: Finished difference. Result has 222 places, 359 transitions, 5568 flow [2024-06-20 16:45:22,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5226, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5568, PETRI_PLACES=222, PETRI_TRANSITIONS=359} [2024-06-20 16:45:22,771 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-20 16:45:22,771 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 359 transitions, 5568 flow [2024-06-20 16:45:22,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:22,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:22,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:22,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 16:45:22,771 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:22,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:22,772 INFO L85 PathProgramCache]: Analyzing trace with hash -787830373, now seen corresponding path program 3 times [2024-06-20 16:45:22,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:22,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861471376] [2024-06-20 16:45:22,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:22,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:22,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:26,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:26,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861471376] [2024-06-20 16:45:26,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861471376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:26,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:26,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:45:26,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328399148] [2024-06-20 16:45:26,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:26,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:45:26,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:26,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:45:26,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:45:26,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:45:26,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 359 transitions, 5568 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:26,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:26,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:45:26,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:29,179 INFO L124 PetriNetUnfolderBase]: 6800/10962 cut-off events. [2024-06-20 16:45:29,180 INFO L125 PetriNetUnfolderBase]: For 450048/450050 co-relation queries the response was YES. [2024-06-20 16:45:29,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67753 conditions, 10962 events. 6800/10962 cut-off events. For 450048/450050 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 75050 event pairs, 2933 based on Foata normal form. 2/10964 useless extension candidates. Maximal degree in co-relation 67642. Up to 10628 conditions per place. [2024-06-20 16:45:29,288 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 336 selfloop transitions, 46 changer transitions 0/386 dead transitions. [2024-06-20 16:45:29,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 386 transitions, 6410 flow [2024-06-20 16:45:29,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:45:29,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:45:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 150 transitions. [2024-06-20 16:45:29,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-20 16:45:29,291 INFO L175 Difference]: Start difference. First operand has 222 places, 359 transitions, 5568 flow. Second operand 10 states and 150 transitions. [2024-06-20 16:45:29,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 386 transitions, 6410 flow [2024-06-20 16:45:30,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 386 transitions, 6379 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-20 16:45:30,035 INFO L231 Difference]: Finished difference. Result has 230 places, 359 transitions, 5636 flow [2024-06-20 16:45:30,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5537, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5636, PETRI_PLACES=230, PETRI_TRANSITIONS=359} [2024-06-20 16:45:30,035 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-20 16:45:30,036 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 359 transitions, 5636 flow [2024-06-20 16:45:30,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:30,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:30,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:30,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 16:45:30,036 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:30,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:30,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1123458441, now seen corresponding path program 4 times [2024-06-20 16:45:30,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:30,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615072644] [2024-06-20 16:45:30,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:30,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:30,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:33,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:33,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615072644] [2024-06-20 16:45:33,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615072644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:33,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:33,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:45:33,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353956433] [2024-06-20 16:45:33,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:33,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:45:33,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:33,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:45:33,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:45:33,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:45:33,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 359 transitions, 5636 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:33,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:33,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:45:33,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:36,808 INFO L124 PetriNetUnfolderBase]: 6794/10948 cut-off events. [2024-06-20 16:45:36,808 INFO L125 PetriNetUnfolderBase]: For 465596/465602 co-relation queries the response was YES. [2024-06-20 16:45:36,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68151 conditions, 10948 events. 6794/10948 cut-off events. For 465596/465602 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 74855 event pairs, 2882 based on Foata normal form. 3/10950 useless extension candidates. Maximal degree in co-relation 68038. Up to 10579 conditions per place. [2024-06-20 16:45:36,927 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 333 selfloop transitions, 53 changer transitions 0/390 dead transitions. [2024-06-20 16:45:36,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 390 transitions, 6717 flow [2024-06-20 16:45:36,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:45:36,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:45:36,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-20 16:45:36,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-20 16:45:36,929 INFO L175 Difference]: Start difference. First operand has 230 places, 359 transitions, 5636 flow. Second operand 7 states and 110 transitions. [2024-06-20 16:45:36,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 390 transitions, 6717 flow [2024-06-20 16:45:37,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 390 transitions, 6619 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:45:37,890 INFO L231 Difference]: Finished difference. Result has 232 places, 371 transitions, 5846 flow [2024-06-20 16:45:37,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5538, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5846, PETRI_PLACES=232, PETRI_TRANSITIONS=371} [2024-06-20 16:45:37,891 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-20 16:45:37,891 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 371 transitions, 5846 flow [2024-06-20 16:45:37,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:37,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:37,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:37,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 16:45:37,892 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:37,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:37,892 INFO L85 PathProgramCache]: Analyzing trace with hash -277482081, now seen corresponding path program 5 times [2024-06-20 16:45:37,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:37,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446924017] [2024-06-20 16:45:37,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:37,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:41,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:41,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446924017] [2024-06-20 16:45:41,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446924017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:41,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:41,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:45:41,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967808402] [2024-06-20 16:45:41,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:41,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:45:41,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:41,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:45:41,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:45:41,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:45:41,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 371 transitions, 5846 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:41,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:41,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:45:41,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:44,485 INFO L124 PetriNetUnfolderBase]: 6804/10972 cut-off events. [2024-06-20 16:45:44,486 INFO L125 PetriNetUnfolderBase]: For 484980/484988 co-relation queries the response was YES. [2024-06-20 16:45:44,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69964 conditions, 10972 events. 6804/10972 cut-off events. For 484980/484988 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 75188 event pairs, 2922 based on Foata normal form. 10/10982 useless extension candidates. Maximal degree in co-relation 69848. Up to 10611 conditions per place. [2024-06-20 16:45:44,608 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 351 selfloop transitions, 56 changer transitions 0/411 dead transitions. [2024-06-20 16:45:44,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 411 transitions, 6944 flow [2024-06-20 16:45:44,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:45:44,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:45:44,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 16:45:44,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-20 16:45:44,609 INFO L175 Difference]: Start difference. First operand has 232 places, 371 transitions, 5846 flow. Second operand 9 states and 146 transitions. [2024-06-20 16:45:44,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 411 transitions, 6944 flow [2024-06-20 16:45:45,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 411 transitions, 6846 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-20 16:45:45,554 INFO L231 Difference]: Finished difference. Result has 239 places, 375 transitions, 5968 flow [2024-06-20 16:45:45,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5748, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5968, PETRI_PLACES=239, PETRI_TRANSITIONS=375} [2024-06-20 16:45:45,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-20 16:45:45,555 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 375 transitions, 5968 flow [2024-06-20 16:45:45,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:45,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:45,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:45,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 16:45:45,556 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:45,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:45,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1002102001, now seen corresponding path program 6 times [2024-06-20 16:45:45,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:45,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862244809] [2024-06-20 16:45:45,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:45,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:48,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:48,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862244809] [2024-06-20 16:45:48,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862244809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:48,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:48,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:45:48,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745122927] [2024-06-20 16:45:48,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:48,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:45:48,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:48,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:45:48,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:45:48,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:45:48,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 375 transitions, 5968 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:48,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:48,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:45:48,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:51,778 INFO L124 PetriNetUnfolderBase]: 6798/10960 cut-off events. [2024-06-20 16:45:51,778 INFO L125 PetriNetUnfolderBase]: For 500425/500427 co-relation queries the response was YES. [2024-06-20 16:45:51,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70241 conditions, 10960 events. 6798/10960 cut-off events. For 500425/500427 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 75034 event pairs, 2929 based on Foata normal form. 2/10962 useless extension candidates. Maximal degree in co-relation 70123. Up to 10606 conditions per place. [2024-06-20 16:45:51,887 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 343 selfloop transitions, 51 changer transitions 0/398 dead transitions. [2024-06-20 16:45:51,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 398 transitions, 6826 flow [2024-06-20 16:45:51,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:45:51,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:45:51,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 16:45:51,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-20 16:45:51,889 INFO L175 Difference]: Start difference. First operand has 239 places, 375 transitions, 5968 flow. Second operand 7 states and 115 transitions. [2024-06-20 16:45:51,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 398 transitions, 6826 flow [2024-06-20 16:45:53,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 398 transitions, 6727 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 16:45:53,008 INFO L231 Difference]: Finished difference. Result has 241 places, 375 transitions, 5981 flow [2024-06-20 16:45:53,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5869, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5981, PETRI_PLACES=241, PETRI_TRANSITIONS=375} [2024-06-20 16:45:53,008 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-20 16:45:53,008 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 375 transitions, 5981 flow [2024-06-20 16:45:53,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:53,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:53,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:53,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 16:45:53,009 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:53,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:53,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1100005973, now seen corresponding path program 1 times [2024-06-20 16:45:53,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:53,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133206754] [2024-06-20 16:45:53,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:53,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:55,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:55,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133206754] [2024-06-20 16:45:55,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133206754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:55,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:55,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:45:55,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450754260] [2024-06-20 16:45:55,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:55,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:45:55,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:55,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:45:55,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:45:55,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:45:55,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 375 transitions, 5981 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:55,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:55,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:45:55,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:58,554 INFO L124 PetriNetUnfolderBase]: 6786/10951 cut-off events. [2024-06-20 16:45:58,555 INFO L125 PetriNetUnfolderBase]: For 498772/498776 co-relation queries the response was YES. [2024-06-20 16:45:58,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69956 conditions, 10951 events. 6786/10951 cut-off events. For 498772/498776 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 74856 event pairs, 2934 based on Foata normal form. 6/10957 useless extension candidates. Maximal degree in co-relation 69838. Up to 10622 conditions per place. [2024-06-20 16:45:58,688 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 367 selfloop transitions, 27 changer transitions 0/398 dead transitions. [2024-06-20 16:45:58,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 398 transitions, 6827 flow [2024-06-20 16:45:58,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:45:58,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:45:58,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 16:45:58,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-20 16:45:58,690 INFO L175 Difference]: Start difference. First operand has 241 places, 375 transitions, 5981 flow. Second operand 7 states and 118 transitions. [2024-06-20 16:45:58,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 398 transitions, 6827 flow [2024-06-20 16:45:59,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 398 transitions, 6709 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 16:45:59,863 INFO L231 Difference]: Finished difference. Result has 241 places, 375 transitions, 5923 flow [2024-06-20 16:45:59,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5863, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5923, PETRI_PLACES=241, PETRI_TRANSITIONS=375} [2024-06-20 16:45:59,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-20 16:45:59,867 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 375 transitions, 5923 flow [2024-06-20 16:45:59,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:59,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:59,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:59,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 16:45:59,873 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:59,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:59,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1437003707, now seen corresponding path program 1 times [2024-06-20 16:45:59,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:59,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311638089] [2024-06-20 16:45:59,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:59,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:03,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:03,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311638089] [2024-06-20 16:46:03,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311638089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:03,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:03,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:46:03,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408736592] [2024-06-20 16:46:03,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:03,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:46:03,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:03,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:46:03,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:46:03,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:46:03,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 375 transitions, 5923 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:03,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:03,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:46:03,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:06,352 INFO L124 PetriNetUnfolderBase]: 6876/11046 cut-off events. [2024-06-20 16:46:06,352 INFO L125 PetriNetUnfolderBase]: For 506784/506794 co-relation queries the response was YES. [2024-06-20 16:46:06,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71248 conditions, 11046 events. 6876/11046 cut-off events. For 506784/506794 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 75382 event pairs, 2904 based on Foata normal form. 12/11058 useless extension candidates. Maximal degree in co-relation 71130. Up to 10480 conditions per place. [2024-06-20 16:46:06,497 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 335 selfloop transitions, 92 changer transitions 0/431 dead transitions. [2024-06-20 16:46:06,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 431 transitions, 7335 flow [2024-06-20 16:46:06,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:46:06,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:46:06,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-20 16:46:06,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-20 16:46:06,499 INFO L175 Difference]: Start difference. First operand has 241 places, 375 transitions, 5923 flow. Second operand 10 states and 171 transitions. [2024-06-20 16:46:06,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 431 transitions, 7335 flow [2024-06-20 16:46:07,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 431 transitions, 7251 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 16:46:07,649 INFO L231 Difference]: Finished difference. Result has 245 places, 384 transitions, 6211 flow [2024-06-20 16:46:07,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5839, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6211, PETRI_PLACES=245, PETRI_TRANSITIONS=384} [2024-06-20 16:46:07,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-20 16:46:07,650 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 384 transitions, 6211 flow [2024-06-20 16:46:07,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:07,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:07,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:07,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 16:46:07,654 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:07,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:07,655 INFO L85 PathProgramCache]: Analyzing trace with hash -416113965, now seen corresponding path program 1 times [2024-06-20 16:46:07,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:07,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585060941] [2024-06-20 16:46:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:07,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:11,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:11,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585060941] [2024-06-20 16:46:11,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585060941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:11,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:11,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:46:11,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841369055] [2024-06-20 16:46:11,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:11,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:46:11,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:11,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:46:11,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:46:11,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:46:11,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 384 transitions, 6211 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 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) [2024-06-20 16:46:11,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:11,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:46:11,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:14,858 INFO L124 PetriNetUnfolderBase]: 6806/10979 cut-off events. [2024-06-20 16:46:14,859 INFO L125 PetriNetUnfolderBase]: For 557021/557087 co-relation queries the response was YES. [2024-06-20 16:46:14,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72890 conditions, 10979 events. 6806/10979 cut-off events. For 557021/557087 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 75520 event pairs, 2892 based on Foata normal form. 55/10991 useless extension candidates. Maximal degree in co-relation 72772. Up to 10457 conditions per place. [2024-06-20 16:46:15,011 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 328 selfloop transitions, 64 changer transitions 0/418 dead transitions. [2024-06-20 16:46:15,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 418 transitions, 7159 flow [2024-06-20 16:46:15,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:46:15,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:46:15,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 16:46:15,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-20 16:46:15,013 INFO L175 Difference]: Start difference. First operand has 245 places, 384 transitions, 6211 flow. Second operand 9 states and 149 transitions. [2024-06-20 16:46:15,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 418 transitions, 7159 flow [2024-06-20 16:46:16,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 418 transitions, 6994 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-20 16:46:16,260 INFO L231 Difference]: Finished difference. Result has 249 places, 386 transitions, 6238 flow [2024-06-20 16:46:16,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6046, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6238, PETRI_PLACES=249, PETRI_TRANSITIONS=386} [2024-06-20 16:46:16,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-20 16:46:16,261 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 386 transitions, 6238 flow [2024-06-20 16:46:16,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 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) [2024-06-20 16:46:16,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:16,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:16,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 16:46:16,262 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:16,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:16,262 INFO L85 PathProgramCache]: Analyzing trace with hash -199075193, now seen corresponding path program 2 times [2024-06-20 16:46:16,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:16,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642609558] [2024-06-20 16:46:16,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:16,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:19,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:19,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642609558] [2024-06-20 16:46:19,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642609558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:19,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:19,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:46:19,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918953188] [2024-06-20 16:46:19,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:19,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:46:19,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:19,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:46:19,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:46:19,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:46:19,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 386 transitions, 6238 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:19,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:19,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:46:19,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:22,581 INFO L124 PetriNetUnfolderBase]: 6930/11131 cut-off events. [2024-06-20 16:46:22,582 INFO L125 PetriNetUnfolderBase]: For 552530/552544 co-relation queries the response was YES. [2024-06-20 16:46:22,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74007 conditions, 11131 events. 6930/11131 cut-off events. For 552530/552544 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 76090 event pairs, 2901 based on Foata normal form. 16/11147 useless extension candidates. Maximal degree in co-relation 73887. Up to 10569 conditions per place. [2024-06-20 16:46:22,715 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 322 selfloop transitions, 94 changer transitions 0/420 dead transitions. [2024-06-20 16:46:22,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 420 transitions, 7346 flow [2024-06-20 16:46:22,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:46:22,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:46:22,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:46:22,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 16:46:22,717 INFO L175 Difference]: Start difference. First operand has 249 places, 386 transitions, 6238 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:46:22,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 420 transitions, 7346 flow [2024-06-20 16:46:23,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 420 transitions, 7210 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 16:46:23,927 INFO L231 Difference]: Finished difference. Result has 251 places, 389 transitions, 6390 flow [2024-06-20 16:46:23,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6102, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6390, PETRI_PLACES=251, PETRI_TRANSITIONS=389} [2024-06-20 16:46:23,939 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-20 16:46:23,939 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 389 transitions, 6390 flow [2024-06-20 16:46:23,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:23,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:23,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:23,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 16:46:23,940 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:23,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:23,940 INFO L85 PathProgramCache]: Analyzing trace with hash -339693801, now seen corresponding path program 3 times [2024-06-20 16:46:23,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:23,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612101888] [2024-06-20 16:46:23,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:23,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:27,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:27,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612101888] [2024-06-20 16:46:27,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612101888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:27,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:27,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:46:27,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381290435] [2024-06-20 16:46:27,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:27,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:46:27,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:27,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:46:27,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:46:27,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:46:27,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 389 transitions, 6390 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:27,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:27,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:46:27,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:30,475 INFO L124 PetriNetUnfolderBase]: 6972/11221 cut-off events. [2024-06-20 16:46:30,475 INFO L125 PetriNetUnfolderBase]: For 584199/584236 co-relation queries the response was YES. [2024-06-20 16:46:30,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75130 conditions, 11221 events. 6972/11221 cut-off events. For 584199/584236 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 76787 event pairs, 2659 based on Foata normal form. 39/11260 useless extension candidates. Maximal degree in co-relation 75009. Up to 10313 conditions per place. [2024-06-20 16:46:30,642 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 120 changer transitions 0/433 dead transitions. [2024-06-20 16:46:30,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 433 transitions, 7933 flow [2024-06-20 16:46:30,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:46:30,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:46:30,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 16:46:30,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-20 16:46:30,643 INFO L175 Difference]: Start difference. First operand has 251 places, 389 transitions, 6390 flow. Second operand 7 states and 129 transitions. [2024-06-20 16:46:30,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 433 transitions, 7933 flow [2024-06-20 16:46:31,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 433 transitions, 7702 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-20 16:46:32,001 INFO L231 Difference]: Finished difference. Result has 254 places, 401 transitions, 6793 flow [2024-06-20 16:46:32,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6169, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6793, PETRI_PLACES=254, PETRI_TRANSITIONS=401} [2024-06-20 16:46:32,002 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-20 16:46:32,002 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 401 transitions, 6793 flow [2024-06-20 16:46:32,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:32,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:32,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:32,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 16:46:32,002 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:32,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:32,003 INFO L85 PathProgramCache]: Analyzing trace with hash -328265961, now seen corresponding path program 4 times [2024-06-20 16:46:32,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:32,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246873990] [2024-06-20 16:46:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:32,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:35,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:35,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246873990] [2024-06-20 16:46:35,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246873990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:35,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:35,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:46:35,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908041397] [2024-06-20 16:46:35,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:35,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:46:35,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:35,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:46:35,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:46:35,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:46:35,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 401 transitions, 6793 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:35,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:35,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:46:35,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:38,771 INFO L124 PetriNetUnfolderBase]: 6966/11211 cut-off events. [2024-06-20 16:46:38,771 INFO L125 PetriNetUnfolderBase]: For 590265/590302 co-relation queries the response was YES. [2024-06-20 16:46:38,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76525 conditions, 11211 events. 6966/11211 cut-off events. For 590265/590302 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 76665 event pairs, 2668 based on Foata normal form. 39/11250 useless extension candidates. Maximal degree in co-relation 76402. Up to 10310 conditions per place. [2024-06-20 16:46:38,913 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 302 selfloop transitions, 121 changer transitions 0/427 dead transitions. [2024-06-20 16:46:38,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 427 transitions, 7915 flow [2024-06-20 16:46:38,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:46:38,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:46:38,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 16:46:38,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-20 16:46:38,914 INFO L175 Difference]: Start difference. First operand has 254 places, 401 transitions, 6793 flow. Second operand 7 states and 122 transitions. [2024-06-20 16:46:38,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 427 transitions, 7915 flow [2024-06-20 16:46:40,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 427 transitions, 7781 flow, removed 61 selfloop flow, removed 2 redundant places. [2024-06-20 16:46:40,390 INFO L231 Difference]: Finished difference. Result has 259 places, 401 transitions, 6907 flow [2024-06-20 16:46:40,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6659, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6907, PETRI_PLACES=259, PETRI_TRANSITIONS=401} [2024-06-20 16:46:40,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-20 16:46:40,392 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 401 transitions, 6907 flow [2024-06-20 16:46:40,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:40,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:40,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:40,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 16:46:40,392 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:40,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:40,393 INFO L85 PathProgramCache]: Analyzing trace with hash -717027945, now seen corresponding path program 5 times [2024-06-20 16:46:40,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:40,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307506773] [2024-06-20 16:46:40,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:40,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:43,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:43,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307506773] [2024-06-20 16:46:43,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307506773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:43,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:43,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:46:43,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138354239] [2024-06-20 16:46:43,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:43,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:46:43,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:43,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:46:43,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:46:43,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:46:43,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 401 transitions, 6907 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:43,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:43,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:46:43,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:46,933 INFO L124 PetriNetUnfolderBase]: 6948/11191 cut-off events. [2024-06-20 16:46:46,933 INFO L125 PetriNetUnfolderBase]: For 604670/604707 co-relation queries the response was YES. [2024-06-20 16:46:47,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76225 conditions, 11191 events. 6948/11191 cut-off events. For 604670/604707 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 76526 event pairs, 2589 based on Foata normal form. 43/11234 useless extension candidates. Maximal degree in co-relation 76100. Up to 10439 conditions per place. [2024-06-20 16:46:47,062 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 319 selfloop transitions, 108 changer transitions 0/431 dead transitions. [2024-06-20 16:46:47,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 431 transitions, 8053 flow [2024-06-20 16:46:47,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:46:47,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:46:47,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 16:46:47,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-20 16:46:47,063 INFO L175 Difference]: Start difference. First operand has 259 places, 401 transitions, 6907 flow. Second operand 7 states and 128 transitions. [2024-06-20 16:46:47,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 431 transitions, 8053 flow [2024-06-20 16:46:48,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 431 transitions, 7638 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-20 16:46:48,754 INFO L231 Difference]: Finished difference. Result has 260 places, 401 transitions, 6719 flow [2024-06-20 16:46:48,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6492, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6719, PETRI_PLACES=260, PETRI_TRANSITIONS=401} [2024-06-20 16:46:48,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-20 16:46:48,754 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 401 transitions, 6719 flow [2024-06-20 16:46:48,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:48,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:48,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:48,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 16:46:48,755 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:48,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:48,756 INFO L85 PathProgramCache]: Analyzing trace with hash -866955949, now seen corresponding path program 2 times [2024-06-20 16:46:48,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:48,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984008929] [2024-06-20 16:46:48,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:48,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:53,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:53,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:53,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984008929] [2024-06-20 16:46:53,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984008929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:53,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:53,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:46:53,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879232441] [2024-06-20 16:46:53,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:53,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:46:53,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:53,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:46:53,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:46:53,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:46:53,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 401 transitions, 6719 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 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) [2024-06-20 16:46:53,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:53,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:46:53,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:56,774 INFO L124 PetriNetUnfolderBase]: 6873/11068 cut-off events. [2024-06-20 16:46:56,775 INFO L125 PetriNetUnfolderBase]: For 647073/647139 co-relation queries the response was YES. [2024-06-20 16:46:57,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75910 conditions, 11068 events. 6873/11068 cut-off events. For 647073/647139 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 75975 event pairs, 2872 based on Foata normal form. 55/11080 useless extension candidates. Maximal degree in co-relation 75785. Up to 10371 conditions per place. [2024-06-20 16:46:57,136 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 326 selfloop transitions, 86 changer transitions 0/438 dead transitions. [2024-06-20 16:46:57,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 438 transitions, 7725 flow [2024-06-20 16:46:57,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:46:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:46:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:46:57,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-20 16:46:57,138 INFO L175 Difference]: Start difference. First operand has 260 places, 401 transitions, 6719 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:46:57,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 438 transitions, 7725 flow [2024-06-20 16:46:58,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 438 transitions, 7452 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 16:46:58,128 INFO L231 Difference]: Finished difference. Result has 261 places, 403 transitions, 6696 flow [2024-06-20 16:46:58,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6446, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6696, PETRI_PLACES=261, PETRI_TRANSITIONS=403} [2024-06-20 16:46:58,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-20 16:46:58,129 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 403 transitions, 6696 flow [2024-06-20 16:46:58,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 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) [2024-06-20 16:46:58,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:58,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:58,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 16:46:58,129 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:58,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:58,130 INFO L85 PathProgramCache]: Analyzing trace with hash -467458639, now seen corresponding path program 3 times [2024-06-20 16:46:58,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:58,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677625909] [2024-06-20 16:46:58,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:58,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:02,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:02,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677625909] [2024-06-20 16:47:02,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677625909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:02,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:02,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:47:02,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339652338] [2024-06-20 16:47:02,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:02,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:47:02,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:02,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:47:02,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:47:02,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:47:02,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 403 transitions, 6696 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 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) [2024-06-20 16:47:02,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:02,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:47:02,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:05,510 INFO L124 PetriNetUnfolderBase]: 6934/11190 cut-off events. [2024-06-20 16:47:05,510 INFO L125 PetriNetUnfolderBase]: For 668081/668161 co-relation queries the response was YES. [2024-06-20 16:47:05,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77005 conditions, 11190 events. 6934/11190 cut-off events. For 668081/668161 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 76972 event pairs, 2563 based on Foata normal form. 73/11216 useless extension candidates. Maximal degree in co-relation 76879. Up to 10335 conditions per place. [2024-06-20 16:47:05,637 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 302 selfloop transitions, 110 changer transitions 0/438 dead transitions. [2024-06-20 16:47:05,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 438 transitions, 7912 flow [2024-06-20 16:47:05,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:47:05,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:47:05,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 16:47:05,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:47:05,639 INFO L175 Difference]: Start difference. First operand has 261 places, 403 transitions, 6696 flow. Second operand 8 states and 144 transitions. [2024-06-20 16:47:05,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 438 transitions, 7912 flow [2024-06-20 16:47:07,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 438 transitions, 7716 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 16:47:07,184 INFO L231 Difference]: Finished difference. Result has 263 places, 405 transitions, 6791 flow [2024-06-20 16:47:07,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6500, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6791, PETRI_PLACES=263, PETRI_TRANSITIONS=405} [2024-06-20 16:47:07,186 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-20 16:47:07,186 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 405 transitions, 6791 flow [2024-06-20 16:47:07,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 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) [2024-06-20 16:47:07,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:07,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:07,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 16:47:07,186 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:07,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:07,187 INFO L85 PathProgramCache]: Analyzing trace with hash -453173839, now seen corresponding path program 4 times [2024-06-20 16:47:07,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:07,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063722280] [2024-06-20 16:47:07,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:07,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:11,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:11,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063722280] [2024-06-20 16:47:11,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063722280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:11,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:11,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:47:11,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862962823] [2024-06-20 16:47:11,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:11,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:47:11,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:11,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:47:11,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:47:11,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:47:11,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 405 transitions, 6791 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 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) [2024-06-20 16:47:11,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:11,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:47:11,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:14,495 INFO L124 PetriNetUnfolderBase]: 7041/11359 cut-off events. [2024-06-20 16:47:14,495 INFO L125 PetriNetUnfolderBase]: For 704656/704736 co-relation queries the response was YES. [2024-06-20 16:47:14,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79031 conditions, 11359 events. 7041/11359 cut-off events. For 704656/704736 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 78230 event pairs, 2566 based on Foata normal form. 73/11385 useless extension candidates. Maximal degree in co-relation 78904. Up to 10116 conditions per place. [2024-06-20 16:47:14,643 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 303 selfloop transitions, 117 changer transitions 0/446 dead transitions. [2024-06-20 16:47:14,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 446 transitions, 8207 flow [2024-06-20 16:47:14,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:47:14,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:47:14,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 16:47:14,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 16:47:14,653 INFO L175 Difference]: Start difference. First operand has 263 places, 405 transitions, 6791 flow. Second operand 8 states and 148 transitions. [2024-06-20 16:47:14,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 446 transitions, 8207 flow [2024-06-20 16:47:15,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 446 transitions, 7944 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 16:47:15,979 INFO L231 Difference]: Finished difference. Result has 265 places, 408 transitions, 6861 flow [2024-06-20 16:47:15,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6528, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6861, PETRI_PLACES=265, PETRI_TRANSITIONS=408} [2024-06-20 16:47:15,981 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-20 16:47:15,981 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 408 transitions, 6861 flow [2024-06-20 16:47:15,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 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) [2024-06-20 16:47:15,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:15,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:15,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 16:47:15,982 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:15,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:15,982 INFO L85 PathProgramCache]: Analyzing trace with hash -168895079, now seen corresponding path program 1 times [2024-06-20 16:47:15,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:15,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236281163] [2024-06-20 16:47:15,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:15,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:18,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:18,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236281163] [2024-06-20 16:47:18,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236281163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:18,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:18,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:47:18,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217942823] [2024-06-20 16:47:18,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:18,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:47:18,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:18,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:47:18,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:47:18,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:47:18,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 408 transitions, 6861 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 16:47:18,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:18,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:47:18,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:22,324 INFO L124 PetriNetUnfolderBase]: 7254/11657 cut-off events. [2024-06-20 16:47:22,324 INFO L125 PetriNetUnfolderBase]: For 719851/719855 co-relation queries the response was YES. [2024-06-20 16:47:22,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81570 conditions, 11657 events. 7254/11657 cut-off events. For 719851/719855 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 80012 event pairs, 2995 based on Foata normal form. 4/11661 useless extension candidates. Maximal degree in co-relation 81442. Up to 11201 conditions per place. [2024-06-20 16:47:22,453 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 408 selfloop transitions, 32 changer transitions 0/444 dead transitions. [2024-06-20 16:47:22,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 444 transitions, 8103 flow [2024-06-20 16:47:22,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:47:22,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:47:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 16:47:22,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:47:22,454 INFO L175 Difference]: Start difference. First operand has 265 places, 408 transitions, 6861 flow. Second operand 7 states and 126 transitions. [2024-06-20 16:47:22,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 444 transitions, 8103 flow [2024-06-20 16:47:23,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 444 transitions, 7911 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-20 16:47:24,004 INFO L231 Difference]: Finished difference. Result has 268 places, 412 transitions, 6882 flow [2024-06-20 16:47:24,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6669, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6882, PETRI_PLACES=268, PETRI_TRANSITIONS=412} [2024-06-20 16:47:24,005 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-20 16:47:24,005 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 412 transitions, 6882 flow [2024-06-20 16:47:24,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 16:47:24,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:24,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:24,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 16:47:24,006 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:24,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:24,006 INFO L85 PathProgramCache]: Analyzing trace with hash -328372353, now seen corresponding path program 2 times [2024-06-20 16:47:24,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:24,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344775737] [2024-06-20 16:47:24,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:24,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:27,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:27,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:27,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344775737] [2024-06-20 16:47:27,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344775737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:27,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:27,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:47:27,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138024663] [2024-06-20 16:47:27,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:27,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:47:27,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:27,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:47:27,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:47:27,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:47:27,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 412 transitions, 6882 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 16:47:27,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:27,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:47:27,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:30,579 INFO L124 PetriNetUnfolderBase]: 7262/11657 cut-off events. [2024-06-20 16:47:30,579 INFO L125 PetriNetUnfolderBase]: For 739159/739163 co-relation queries the response was YES. [2024-06-20 16:47:30,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81950 conditions, 11657 events. 7262/11657 cut-off events. For 739159/739163 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 79854 event pairs, 3025 based on Foata normal form. 4/11661 useless extension candidates. Maximal degree in co-relation 81820. Up to 11328 conditions per place. [2024-06-20 16:47:30,702 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 403 selfloop transitions, 29 changer transitions 0/436 dead transitions. [2024-06-20 16:47:30,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 436 transitions, 7876 flow [2024-06-20 16:47:30,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:47:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:47:30,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 16:47:30,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-20 16:47:30,704 INFO L175 Difference]: Start difference. First operand has 268 places, 412 transitions, 6882 flow. Second operand 7 states and 116 transitions. [2024-06-20 16:47:30,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 436 transitions, 7876 flow [2024-06-20 16:47:32,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 436 transitions, 7770 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-20 16:47:32,185 INFO L231 Difference]: Finished difference. Result has 272 places, 414 transitions, 6917 flow [2024-06-20 16:47:32,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6780, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6917, PETRI_PLACES=272, PETRI_TRANSITIONS=414} [2024-06-20 16:47:32,185 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-20 16:47:32,186 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 414 transitions, 6917 flow [2024-06-20 16:47:32,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 16:47:32,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:32,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:32,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 16:47:32,186 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:32,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:32,187 INFO L85 PathProgramCache]: Analyzing trace with hash -717019017, now seen corresponding path program 3 times [2024-06-20 16:47:32,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:32,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139190441] [2024-06-20 16:47:32,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:32,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:35,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:35,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139190441] [2024-06-20 16:47:35,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139190441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:35,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:35,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:47:35,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416338399] [2024-06-20 16:47:35,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:35,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:47:35,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:35,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:47:35,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:47:35,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:47:35,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 414 transitions, 6917 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 16:47:35,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:35,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:47:35,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:38,392 INFO L124 PetriNetUnfolderBase]: 7229/11610 cut-off events. [2024-06-20 16:47:38,392 INFO L125 PetriNetUnfolderBase]: For 758873/758877 co-relation queries the response was YES. [2024-06-20 16:47:38,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81274 conditions, 11610 events. 7229/11610 cut-off events. For 758873/758877 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 79537 event pairs, 2964 based on Foata normal form. 16/11626 useless extension candidates. Maximal degree in co-relation 81142. Up to 11231 conditions per place. [2024-06-20 16:47:38,560 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 413 selfloop transitions, 27 changer transitions 0/444 dead transitions. [2024-06-20 16:47:38,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 444 transitions, 7903 flow [2024-06-20 16:47:38,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:47:38,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:47:38,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 16:47:38,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-20 16:47:38,562 INFO L175 Difference]: Start difference. First operand has 272 places, 414 transitions, 6917 flow. Second operand 7 states and 125 transitions. [2024-06-20 16:47:38,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 444 transitions, 7903 flow [2024-06-20 16:47:40,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 444 transitions, 7734 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-20 16:47:40,401 INFO L231 Difference]: Finished difference. Result has 274 places, 414 transitions, 6811 flow [2024-06-20 16:47:40,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6748, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6811, PETRI_PLACES=274, PETRI_TRANSITIONS=414} [2024-06-20 16:47:40,402 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-20 16:47:40,402 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 414 transitions, 6811 flow [2024-06-20 16:47:40,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-20 16:47:40,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:40,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:40,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 16:47:40,403 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:40,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:40,404 INFO L85 PathProgramCache]: Analyzing trace with hash -703867686, now seen corresponding path program 1 times [2024-06-20 16:47:40,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:40,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125602857] [2024-06-20 16:47:40,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:40,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:43,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:43,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125602857] [2024-06-20 16:47:43,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125602857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:43,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:43,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:47:43,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943750294] [2024-06-20 16:47:43,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:43,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:47:43,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:43,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:47:43,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:47:43,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:47:43,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 414 transitions, 6811 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:43,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:43,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:47:43,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:47,428 INFO L124 PetriNetUnfolderBase]: 7257/11649 cut-off events. [2024-06-20 16:47:47,428 INFO L125 PetriNetUnfolderBase]: For 767576/767584 co-relation queries the response was YES. [2024-06-20 16:47:47,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81638 conditions, 11649 events. 7257/11649 cut-off events. For 767576/767584 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 79536 event pairs, 2810 based on Foata normal form. 16/11665 useless extension candidates. Maximal degree in co-relation 81505. Up to 11213 conditions per place. [2024-06-20 16:47:47,578 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 412 selfloop transitions, 44 changer transitions 0/460 dead transitions. [2024-06-20 16:47:47,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 460 transitions, 7923 flow [2024-06-20 16:47:47,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:47:47,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:47:47,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 16:47:47,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-20 16:47:47,580 INFO L175 Difference]: Start difference. First operand has 274 places, 414 transitions, 6811 flow. Second operand 9 states and 149 transitions. [2024-06-20 16:47:47,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 460 transitions, 7923 flow [2024-06-20 16:47:49,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 460 transitions, 7862 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 16:47:49,463 INFO L231 Difference]: Finished difference. Result has 278 places, 418 transitions, 6925 flow [2024-06-20 16:47:49,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6750, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6925, PETRI_PLACES=278, PETRI_TRANSITIONS=418} [2024-06-20 16:47:49,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-20 16:47:49,463 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 418 transitions, 6925 flow [2024-06-20 16:47:49,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:49,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:49,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:49,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 16:47:49,464 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:49,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:49,465 INFO L85 PathProgramCache]: Analyzing trace with hash -437843976, now seen corresponding path program 2 times [2024-06-20 16:47:49,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:49,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038415791] [2024-06-20 16:47:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:49,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:53,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:53,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:53,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038415791] [2024-06-20 16:47:53,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038415791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:53,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:53,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:47:53,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004815210] [2024-06-20 16:47:53,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:53,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:47:53,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:53,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:47:53,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:47:53,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:47:53,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 418 transitions, 6925 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:53,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:53,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:47:53,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:56,527 INFO L124 PetriNetUnfolderBase]: 7293/11705 cut-off events. [2024-06-20 16:47:56,528 INFO L125 PetriNetUnfolderBase]: For 794431/794439 co-relation queries the response was YES. [2024-06-20 16:47:56,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82410 conditions, 11705 events. 7293/11705 cut-off events. For 794431/794439 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 80184 event pairs, 3050 based on Foata normal form. 18/11723 useless extension candidates. Maximal degree in co-relation 82275. Up to 11357 conditions per place. [2024-06-20 16:47:56,713 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 413 selfloop transitions, 40 changer transitions 0/457 dead transitions. [2024-06-20 16:47:56,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 457 transitions, 7976 flow [2024-06-20 16:47:56,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:47:56,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:47:56,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 16:47:56,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-20 16:47:56,715 INFO L175 Difference]: Start difference. First operand has 278 places, 418 transitions, 6925 flow. Second operand 9 states and 146 transitions. [2024-06-20 16:47:56,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 457 transitions, 7976 flow [2024-06-20 16:47:58,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 457 transitions, 7852 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 16:47:58,709 INFO L231 Difference]: Finished difference. Result has 281 places, 419 transitions, 6897 flow [2024-06-20 16:47:58,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6801, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6897, PETRI_PLACES=281, PETRI_TRANSITIONS=419} [2024-06-20 16:47:58,709 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-20 16:47:58,709 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 419 transitions, 6897 flow [2024-06-20 16:47:58,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:58,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:58,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:58,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 16:47:58,710 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:58,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:58,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1494586818, now seen corresponding path program 3 times [2024-06-20 16:47:58,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:58,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342539712] [2024-06-20 16:47:58,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:58,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:02,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:02,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342539712] [2024-06-20 16:48:02,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342539712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:02,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:02,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:48:02,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683996071] [2024-06-20 16:48:02,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:02,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:48:02,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:02,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:48:02,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:48:02,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:02,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 419 transitions, 6897 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:02,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:02,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:02,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:05,732 INFO L124 PetriNetUnfolderBase]: 7337/11773 cut-off events. [2024-06-20 16:48:05,733 INFO L125 PetriNetUnfolderBase]: For 814106/814114 co-relation queries the response was YES. [2024-06-20 16:48:05,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83029 conditions, 11773 events. 7337/11773 cut-off events. For 814106/814114 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 80792 event pairs, 3044 based on Foata normal form. 16/11789 useless extension candidates. Maximal degree in co-relation 82893. Up to 11375 conditions per place. [2024-06-20 16:48:05,885 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 418 selfloop transitions, 45 changer transitions 0/467 dead transitions. [2024-06-20 16:48:05,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 467 transitions, 8047 flow [2024-06-20 16:48:05,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:48:05,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:48:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-20 16:48:05,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 16:48:05,887 INFO L175 Difference]: Start difference. First operand has 281 places, 419 transitions, 6897 flow. Second operand 10 states and 160 transitions. [2024-06-20 16:48:05,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 467 transitions, 8047 flow [2024-06-20 16:48:07,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 467 transitions, 7976 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 16:48:07,908 INFO L231 Difference]: Finished difference. Result has 286 places, 424 transitions, 7007 flow [2024-06-20 16:48:07,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6826, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7007, PETRI_PLACES=286, PETRI_TRANSITIONS=424} [2024-06-20 16:48:07,909 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-20 16:48:07,909 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 424 transitions, 7007 flow [2024-06-20 16:48:07,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:07,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:07,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:07,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 16:48:07,909 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:07,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:07,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1500928488, now seen corresponding path program 1 times [2024-06-20 16:48:07,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:07,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753577903] [2024-06-20 16:48:07,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:07,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:11,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:11,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:11,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753577903] [2024-06-20 16:48:11,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753577903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:11,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:11,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:48:11,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799849600] [2024-06-20 16:48:11,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:11,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:48:11,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:11,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:48:11,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:48:11,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:11,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 424 transitions, 7007 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:11,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:11,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:11,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:15,021 INFO L124 PetriNetUnfolderBase]: 7427/11905 cut-off events. [2024-06-20 16:48:15,022 INFO L125 PetriNetUnfolderBase]: For 844439/844453 co-relation queries the response was YES. [2024-06-20 16:48:15,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85112 conditions, 11905 events. 7427/11905 cut-off events. For 844439/844453 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 81483 event pairs, 2865 based on Foata normal form. 16/11921 useless extension candidates. Maximal degree in co-relation 84974. Up to 10470 conditions per place. [2024-06-20 16:48:15,170 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 282 selfloop transitions, 210 changer transitions 0/496 dead transitions. [2024-06-20 16:48:15,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 496 transitions, 8775 flow [2024-06-20 16:48:15,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:48:15,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:48:15,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 217 transitions. [2024-06-20 16:48:15,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-20 16:48:15,172 INFO L175 Difference]: Start difference. First operand has 286 places, 424 transitions, 7007 flow. Second operand 12 states and 217 transitions. [2024-06-20 16:48:15,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 496 transitions, 8775 flow [2024-06-20 16:48:17,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 496 transitions, 8712 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 16:48:17,504 INFO L231 Difference]: Finished difference. Result has 292 places, 433 transitions, 7560 flow [2024-06-20 16:48:17,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6944, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7560, PETRI_PLACES=292, PETRI_TRANSITIONS=433} [2024-06-20 16:48:17,505 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-20 16:48:17,505 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 433 transitions, 7560 flow [2024-06-20 16:48:17,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:17,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:17,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:17,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 16:48:17,505 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:17,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:17,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1671626082, now seen corresponding path program 1 times [2024-06-20 16:48:17,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:17,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413468100] [2024-06-20 16:48:17,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:17,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:21,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:21,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413468100] [2024-06-20 16:48:21,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413468100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:21,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:21,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:48:21,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452851370] [2024-06-20 16:48:21,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:21,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:48:21,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:21,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:48:21,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:48:21,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:21,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 433 transitions, 7560 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:21,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:21,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:21,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:24,907 INFO L124 PetriNetUnfolderBase]: 7502/12004 cut-off events. [2024-06-20 16:48:24,908 INFO L125 PetriNetUnfolderBase]: For 893256/893270 co-relation queries the response was YES. [2024-06-20 16:48:25,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88770 conditions, 12004 events. 7502/12004 cut-off events. For 893256/893270 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 82157 event pairs, 3082 based on Foata normal form. 20/12024 useless extension candidates. Maximal degree in co-relation 88631. Up to 11445 conditions per place. [2024-06-20 16:48:25,056 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 361 selfloop transitions, 122 changer transitions 3/490 dead transitions. [2024-06-20 16:48:25,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 490 transitions, 8873 flow [2024-06-20 16:48:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:48:25,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:48:25,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-20 16:48:25,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-20 16:48:25,058 INFO L175 Difference]: Start difference. First operand has 292 places, 433 transitions, 7560 flow. Second operand 10 states and 167 transitions. [2024-06-20 16:48:25,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 490 transitions, 8873 flow [2024-06-20 16:48:26,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 490 transitions, 8536 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-20 16:48:26,819 INFO L231 Difference]: Finished difference. Result has 296 places, 448 transitions, 7701 flow [2024-06-20 16:48:26,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7240, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7701, PETRI_PLACES=296, PETRI_TRANSITIONS=448} [2024-06-20 16:48:26,820 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-20 16:48:26,820 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 448 transitions, 7701 flow [2024-06-20 16:48:26,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:26,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:26,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:26,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 16:48:26,821 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:26,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:26,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1494257412, now seen corresponding path program 2 times [2024-06-20 16:48:26,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:26,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141636492] [2024-06-20 16:48:26,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:26,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:30,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:30,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141636492] [2024-06-20 16:48:30,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141636492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:30,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:30,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:48:30,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811576183] [2024-06-20 16:48:30,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:30,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:48:30,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:30,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:48:30,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:48:30,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:30,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 448 transitions, 7701 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:30,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:30,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:30,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:34,054 INFO L124 PetriNetUnfolderBase]: 7680/12263 cut-off events. [2024-06-20 16:48:34,054 INFO L125 PetriNetUnfolderBase]: For 937669/937683 co-relation queries the response was YES. [2024-06-20 16:48:34,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91723 conditions, 12263 events. 7680/12263 cut-off events. For 937669/937683 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 83862 event pairs, 3056 based on Foata normal form. 16/12279 useless extension candidates. Maximal degree in co-relation 91581. Up to 11535 conditions per place. [2024-06-20 16:48:34,209 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 357 selfloop transitions, 158 changer transitions 1/520 dead transitions. [2024-06-20 16:48:34,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 520 transitions, 9537 flow [2024-06-20 16:48:34,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:48:34,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:48:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-20 16:48:34,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-20 16:48:34,210 INFO L175 Difference]: Start difference. First operand has 296 places, 448 transitions, 7701 flow. Second operand 10 states and 166 transitions. [2024-06-20 16:48:34,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 520 transitions, 9537 flow [2024-06-20 16:48:36,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 520 transitions, 9126 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 16:48:36,173 INFO L231 Difference]: Finished difference. Result has 300 places, 482 transitions, 8263 flow [2024-06-20 16:48:36,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7338, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8263, PETRI_PLACES=300, PETRI_TRANSITIONS=482} [2024-06-20 16:48:36,173 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-20 16:48:36,174 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 482 transitions, 8263 flow [2024-06-20 16:48:36,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:36,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:36,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:36,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 16:48:36,174 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:36,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:36,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1494494562, now seen corresponding path program 3 times [2024-06-20 16:48:36,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:36,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201977278] [2024-06-20 16:48:36,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:36,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:40,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:40,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201977278] [2024-06-20 16:48:40,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201977278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:40,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:40,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:48:40,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919424655] [2024-06-20 16:48:40,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:40,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:48:40,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:40,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:48:40,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:48:40,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:40,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 482 transitions, 8263 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:40,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:40,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:40,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:44,191 INFO L124 PetriNetUnfolderBase]: 7650/12231 cut-off events. [2024-06-20 16:48:44,192 INFO L125 PetriNetUnfolderBase]: For 959323/959337 co-relation queries the response was YES. [2024-06-20 16:48:44,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91666 conditions, 12231 events. 7650/12231 cut-off events. For 959323/959337 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 83723 event pairs, 3089 based on Foata normal form. 20/12251 useless extension candidates. Maximal degree in co-relation 91522. Up to 11516 conditions per place. [2024-06-20 16:48:44,378 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 361 selfloop transitions, 154 changer transitions 2/521 dead transitions. [2024-06-20 16:48:44,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 521 transitions, 9533 flow [2024-06-20 16:48:44,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:48:44,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:48:44,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-20 16:48:44,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-20 16:48:44,379 INFO L175 Difference]: Start difference. First operand has 300 places, 482 transitions, 8263 flow. Second operand 11 states and 180 transitions. [2024-06-20 16:48:44,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 521 transitions, 9533 flow [2024-06-20 16:48:46,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 521 transitions, 9426 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-20 16:48:46,990 INFO L231 Difference]: Finished difference. Result has 308 places, 480 transitions, 8440 flow [2024-06-20 16:48:46,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8156, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8440, PETRI_PLACES=308, PETRI_TRANSITIONS=480} [2024-06-20 16:48:46,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-20 16:48:46,991 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 480 transitions, 8440 flow [2024-06-20 16:48:46,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:46,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:46,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:46,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 16:48:46,991 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:46,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:46,992 INFO L85 PathProgramCache]: Analyzing trace with hash -134271338, now seen corresponding path program 4 times [2024-06-20 16:48:46,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:46,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581620248] [2024-06-20 16:48:46,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:46,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:50,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:50,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581620248] [2024-06-20 16:48:50,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581620248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:50,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:50,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:48:50,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011412453] [2024-06-20 16:48:50,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:50,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:48:50,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:50,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:48:50,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:48:50,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:50,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 480 transitions, 8440 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:50,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:50,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:50,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:54,787 INFO L124 PetriNetUnfolderBase]: 7662/12236 cut-off events. [2024-06-20 16:48:54,787 INFO L125 PetriNetUnfolderBase]: For 995475/995477 co-relation queries the response was YES. [2024-06-20 16:48:54,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92497 conditions, 12236 events. 7662/12236 cut-off events. For 995475/995477 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 83694 event pairs, 3122 based on Foata normal form. 10/12246 useless extension candidates. Maximal degree in co-relation 92351. Up to 11864 conditions per place. [2024-06-20 16:48:54,957 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 463 selfloop transitions, 47 changer transitions 0/514 dead transitions. [2024-06-20 16:48:54,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 514 transitions, 9588 flow [2024-06-20 16:48:54,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:48:54,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:48:54,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 164 transitions. [2024-06-20 16:48:54,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.354978354978355 [2024-06-20 16:48:54,959 INFO L175 Difference]: Start difference. First operand has 308 places, 480 transitions, 8440 flow. Second operand 11 states and 164 transitions. [2024-06-20 16:48:54,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 514 transitions, 9588 flow [2024-06-20 16:48:57,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 514 transitions, 9309 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 16:48:57,079 INFO L231 Difference]: Finished difference. Result has 312 places, 481 transitions, 8275 flow [2024-06-20 16:48:57,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8161, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8275, PETRI_PLACES=312, PETRI_TRANSITIONS=481} [2024-06-20 16:48:57,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-20 16:48:57,079 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 481 transitions, 8275 flow [2024-06-20 16:48:57,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:57,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:57,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:57,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 16:48:57,080 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:57,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:57,080 INFO L85 PathProgramCache]: Analyzing trace with hash -134597768, now seen corresponding path program 5 times [2024-06-20 16:48:57,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:57,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946455866] [2024-06-20 16:48:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:57,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:00,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:00,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946455866] [2024-06-20 16:49:00,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946455866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:00,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:00,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:00,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953761398] [2024-06-20 16:49:00,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:00,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:00,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:00,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:00,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:00,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:00,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 481 transitions, 8275 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:00,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:00,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:00,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:04,588 INFO L124 PetriNetUnfolderBase]: 7757/12393 cut-off events. [2024-06-20 16:49:04,588 INFO L125 PetriNetUnfolderBase]: For 1039524/1039526 co-relation queries the response was YES. [2024-06-20 16:49:04,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94048 conditions, 12393 events. 7757/12393 cut-off events. For 1039524/1039526 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 84985 event pairs, 3139 based on Foata normal form. 8/12401 useless extension candidates. Maximal degree in co-relation 93902. Up to 11896 conditions per place. [2024-06-20 16:49:04,764 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 53 changer transitions 0/523 dead transitions. [2024-06-20 16:49:04,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 523 transitions, 9664 flow [2024-06-20 16:49:04,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:49:04,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:49:04,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 167 transitions. [2024-06-20 16:49:04,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36147186147186144 [2024-06-20 16:49:04,766 INFO L175 Difference]: Start difference. First operand has 312 places, 481 transitions, 8275 flow. Second operand 11 states and 167 transitions. [2024-06-20 16:49:04,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 523 transitions, 9664 flow [2024-06-20 16:49:07,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 523 transitions, 9567 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 16:49:07,287 INFO L231 Difference]: Finished difference. Result has 315 places, 486 transitions, 8389 flow [2024-06-20 16:49:07,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8178, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8389, PETRI_PLACES=315, PETRI_TRANSITIONS=486} [2024-06-20 16:49:07,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-20 16:49:07,288 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 486 transitions, 8389 flow [2024-06-20 16:49:07,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:07,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:07,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:07,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 16:49:07,288 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:49:07,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:07,289 INFO L85 PathProgramCache]: Analyzing trace with hash -123546578, now seen corresponding path program 6 times [2024-06-20 16:49:07,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:07,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625693983] [2024-06-20 16:49:07,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:07,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:12,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:12,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625693983] [2024-06-20 16:49:12,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625693983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:12,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:12,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:12,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858416941] [2024-06-20 16:49:12,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:12,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:12,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:12,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:12,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:12,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:12,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 486 transitions, 8389 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:12,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:12,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:12,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:15,979 INFO L124 PetriNetUnfolderBase]: 7734/12360 cut-off events. [2024-06-20 16:49:15,980 INFO L125 PetriNetUnfolderBase]: For 1049337/1049339 co-relation queries the response was YES. [2024-06-20 16:49:16,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93750 conditions, 12360 events. 7734/12360 cut-off events. For 1049337/1049339 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 84707 event pairs, 3140 based on Foata normal form. 10/12370 useless extension candidates. Maximal degree in co-relation 93602. Up to 11976 conditions per place. [2024-06-20 16:49:16,131 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 467 selfloop transitions, 45 changer transitions 0/516 dead transitions. [2024-06-20 16:49:16,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 516 transitions, 9522 flow [2024-06-20 16:49:16,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:49:16,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:49:16,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-20 16:49:16,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-20 16:49:16,133 INFO L175 Difference]: Start difference. First operand has 315 places, 486 transitions, 8389 flow. Second operand 9 states and 141 transitions. [2024-06-20 16:49:16,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 516 transitions, 9522 flow [2024-06-20 16:49:18,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 516 transitions, 9452 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 16:49:18,387 INFO L231 Difference]: Finished difference. Result has 318 places, 486 transitions, 8414 flow [2024-06-20 16:49:18,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8319, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8414, PETRI_PLACES=318, PETRI_TRANSITIONS=486} [2024-06-20 16:49:18,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-20 16:49:18,388 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 486 transitions, 8414 flow [2024-06-20 16:49:18,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:18,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:18,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:18,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 16:49:18,389 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:49:18,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:18,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1907642412, now seen corresponding path program 2 times [2024-06-20 16:49:18,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:18,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784099869] [2024-06-20 16:49:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:18,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:22,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:22,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784099869] [2024-06-20 16:49:22,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784099869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:22,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:22,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:22,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602686806] [2024-06-20 16:49:22,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:22,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:22,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:22,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:22,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:22,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:22,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 486 transitions, 8414 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:22,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:22,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:22,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:26,536 INFO L124 PetriNetUnfolderBase]: 7894/12572 cut-off events. [2024-06-20 16:49:26,536 INFO L125 PetriNetUnfolderBase]: For 1098529/1098539 co-relation queries the response was YES. [2024-06-20 16:49:26,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96986 conditions, 12572 events. 7894/12572 cut-off events. For 1098529/1098539 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 85810 event pairs, 2957 based on Foata normal form. 12/12584 useless extension candidates. Maximal degree in co-relation 96836. Up to 11600 conditions per place. [2024-06-20 16:49:26,679 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 421 selfloop transitions, 151 changer transitions 0/576 dead transitions. [2024-06-20 16:49:26,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 576 transitions, 10899 flow [2024-06-20 16:49:26,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:49:26,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:49:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 230 transitions. [2024-06-20 16:49:26,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42124542124542125 [2024-06-20 16:49:26,681 INFO L175 Difference]: Start difference. First operand has 318 places, 486 transitions, 8414 flow. Second operand 13 states and 230 transitions. [2024-06-20 16:49:26,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 576 transitions, 10899 flow [2024-06-20 16:49:29,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 576 transitions, 10812 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 16:49:29,062 INFO L231 Difference]: Finished difference. Result has 327 places, 506 transitions, 9181 flow [2024-06-20 16:49:29,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8327, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9181, PETRI_PLACES=327, PETRI_TRANSITIONS=506} [2024-06-20 16:49:29,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-20 16:49:29,063 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 506 transitions, 9181 flow [2024-06-20 16:49:29,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:29,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:29,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:29,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 16:49:29,064 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:49:29,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:29,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1751324352, now seen corresponding path program 3 times [2024-06-20 16:49:29,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:29,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971751122] [2024-06-20 16:49:29,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:29,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:32,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:32,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971751122] [2024-06-20 16:49:32,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971751122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:32,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:32,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:32,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980161184] [2024-06-20 16:49:32,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:32,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:32,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:32,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:32,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:32,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:32,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 506 transitions, 9181 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:32,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:32,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:32,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:37,599 INFO L124 PetriNetUnfolderBase]: 7888/12568 cut-off events. [2024-06-20 16:49:37,599 INFO L125 PetriNetUnfolderBase]: For 1128450/1128460 co-relation queries the response was YES. [2024-06-20 16:49:37,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98165 conditions, 12568 events. 7888/12568 cut-off events. For 1128450/1128460 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 85983 event pairs, 2904 based on Foata normal form. 12/12580 useless extension candidates. Maximal degree in co-relation 98012. Up to 11597 conditions per place. [2024-06-20 16:49:37,769 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 416 selfloop transitions, 153 changer transitions 0/573 dead transitions. [2024-06-20 16:49:37,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 573 transitions, 11071 flow [2024-06-20 16:49:37,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 16:49:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 16:49:37,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 236 transitions. [2024-06-20 16:49:37,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-20 16:49:37,771 INFO L175 Difference]: Start difference. First operand has 327 places, 506 transitions, 9181 flow. Second operand 14 states and 236 transitions. [2024-06-20 16:49:37,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 573 transitions, 11071 flow [2024-06-20 16:49:40,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 573 transitions, 10790 flow, removed 86 selfloop flow, removed 6 redundant places. [2024-06-20 16:49:40,726 INFO L231 Difference]: Finished difference. Result has 335 places, 506 transitions, 9212 flow [2024-06-20 16:49:40,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8900, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9212, PETRI_PLACES=335, PETRI_TRANSITIONS=506} [2024-06-20 16:49:40,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-20 16:49:40,727 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 506 transitions, 9212 flow [2024-06-20 16:49:40,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:40,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:40,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:40,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 16:49:40,727 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:49:40,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:40,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1902280032, now seen corresponding path program 4 times [2024-06-20 16:49:40,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:40,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344523697] [2024-06-20 16:49:40,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:40,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:44,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:44,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344523697] [2024-06-20 16:49:44,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344523697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:44,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:44,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:44,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358170607] [2024-06-20 16:49:44,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:44,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:44,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:44,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:44,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:44,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:44,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 506 transitions, 9212 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:44,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:44,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:44,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:48,600 INFO L124 PetriNetUnfolderBase]: 7882/12554 cut-off events. [2024-06-20 16:49:48,601 INFO L125 PetriNetUnfolderBase]: For 1152113/1152123 co-relation queries the response was YES. [2024-06-20 16:49:48,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98644 conditions, 12554 events. 7882/12554 cut-off events. For 1152113/1152123 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 85734 event pairs, 2974 based on Foata normal form. 12/12566 useless extension candidates. Maximal degree in co-relation 98489. Up to 11594 conditions per place. [2024-06-20 16:49:48,797 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 417 selfloop transitions, 145 changer transitions 0/566 dead transitions. [2024-06-20 16:49:48,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 566 transitions, 10940 flow [2024-06-20 16:49:48,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:49:48,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:49:48,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-20 16:49:48,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-06-20 16:49:48,799 INFO L175 Difference]: Start difference. First operand has 335 places, 506 transitions, 9212 flow. Second operand 11 states and 200 transitions. [2024-06-20 16:49:48,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 566 transitions, 10940 flow [2024-06-20 16:49:51,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 566 transitions, 10641 flow, removed 36 selfloop flow, removed 10 redundant places. [2024-06-20 16:49:51,298 INFO L231 Difference]: Finished difference. Result has 336 places, 506 transitions, 9209 flow [2024-06-20 16:49:51,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8913, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9209, PETRI_PLACES=336, PETRI_TRANSITIONS=506} [2024-06-20 16:49:51,299 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-20 16:49:51,299 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 506 transitions, 9209 flow [2024-06-20 16:49:51,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:51,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:51,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:51,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 16:49:51,299 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:49:51,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:51,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1907941314, now seen corresponding path program 1 times [2024-06-20 16:49:51,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:51,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295440506] [2024-06-20 16:49:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:51,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:54,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:54,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:54,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295440506] [2024-06-20 16:49:54,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295440506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:54,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:54,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:54,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133469980] [2024-06-20 16:49:54,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:54,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:54,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:54,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:54,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:54,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:54,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 506 transitions, 9209 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:54,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:54,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:54,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:00,035 INFO L124 PetriNetUnfolderBase]: 7870/12528 cut-off events. [2024-06-20 16:50:00,036 INFO L125 PetriNetUnfolderBase]: For 1176066/1176076 co-relation queries the response was YES. [2024-06-20 16:50:00,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98615 conditions, 12528 events. 7870/12528 cut-off events. For 1176066/1176076 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 85633 event pairs, 3117 based on Foata normal form. 14/12542 useless extension candidates. Maximal degree in co-relation 98459. Up to 11967 conditions per place. [2024-06-20 16:50:00,271 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 456 selfloop transitions, 94 changer transitions 0/554 dead transitions. [2024-06-20 16:50:00,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 554 transitions, 10595 flow [2024-06-20 16:50:00,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:50:00,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:50:00,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-20 16:50:00,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-20 16:50:00,273 INFO L175 Difference]: Start difference. First operand has 336 places, 506 transitions, 9209 flow. Second operand 11 states and 183 transitions. [2024-06-20 16:50:00,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 554 transitions, 10595 flow [2024-06-20 16:50:02,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 554 transitions, 10247 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-20 16:50:02,831 INFO L231 Difference]: Finished difference. Result has 336 places, 506 transitions, 9055 flow [2024-06-20 16:50:02,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8861, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9055, PETRI_PLACES=336, PETRI_TRANSITIONS=506} [2024-06-20 16:50:02,832 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-20 16:50:02,832 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 506 transitions, 9055 flow [2024-06-20 16:50:02,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:02,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:02,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:02,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 16:50:02,833 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:02,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:02,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1902400188, now seen corresponding path program 4 times [2024-06-20 16:50:02,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:02,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327054189] [2024-06-20 16:50:02,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:02,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:06,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:06,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:06,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327054189] [2024-06-20 16:50:06,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327054189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:06,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:06,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:06,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613420436] [2024-06-20 16:50:06,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:06,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:06,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:06,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:06,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:06,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:50:06,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 506 transitions, 9055 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:06,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:06,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:50:06,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:10,866 INFO L124 PetriNetUnfolderBase]: 7844/12520 cut-off events. [2024-06-20 16:50:10,866 INFO L125 PetriNetUnfolderBase]: For 1188483/1188493 co-relation queries the response was YES. [2024-06-20 16:50:10,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97905 conditions, 12520 events. 7844/12520 cut-off events. For 1188483/1188493 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 85723 event pairs, 3132 based on Foata normal form. 16/12536 useless extension candidates. Maximal degree in co-relation 97748. Up to 12097 conditions per place. [2024-06-20 16:50:11,034 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 464 selfloop transitions, 74 changer transitions 3/545 dead transitions. [2024-06-20 16:50:11,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 545 transitions, 10261 flow [2024-06-20 16:50:11,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:50:11,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:50:11,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-20 16:50:11,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-20 16:50:11,036 INFO L175 Difference]: Start difference. First operand has 336 places, 506 transitions, 9055 flow. Second operand 10 states and 162 transitions. [2024-06-20 16:50:11,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 545 transitions, 10261 flow [2024-06-20 16:50:13,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 545 transitions, 10063 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-20 16:50:13,255 INFO L231 Difference]: Finished difference. Result has 337 places, 504 transitions, 8973 flow [2024-06-20 16:50:13,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8857, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8973, PETRI_PLACES=337, PETRI_TRANSITIONS=504} [2024-06-20 16:50:13,256 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-20 16:50:13,256 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 504 transitions, 8973 flow [2024-06-20 16:50:13,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:13,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:13,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:13,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 16:50:13,257 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:13,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:13,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1911665778, now seen corresponding path program 5 times [2024-06-20 16:50:13,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:13,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792910402] [2024-06-20 16:50:13,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:13,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:17,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:17,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:17,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792910402] [2024-06-20 16:50:17,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792910402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:17,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:17,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:17,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056741545] [2024-06-20 16:50:17,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:17,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:17,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:17,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:17,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:17,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:50:17,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 504 transitions, 8973 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:17,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:17,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:50:17,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:21,881 INFO L124 PetriNetUnfolderBase]: 8002/12772 cut-off events. [2024-06-20 16:50:21,881 INFO L125 PetriNetUnfolderBase]: For 1238401/1238411 co-relation queries the response was YES. [2024-06-20 16:50:22,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100934 conditions, 12772 events. 8002/12772 cut-off events. For 1238401/1238411 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 87627 event pairs, 3117 based on Foata normal form. 16/12788 useless extension candidates. Maximal degree in co-relation 100776. Up to 12188 conditions per place. [2024-06-20 16:50:22,043 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 470 selfloop transitions, 106 changer transitions 1/581 dead transitions. [2024-06-20 16:50:22,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 581 transitions, 11239 flow [2024-06-20 16:50:22,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:50:22,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:50:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-06-20 16:50:22,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-06-20 16:50:22,045 INFO L175 Difference]: Start difference. First operand has 337 places, 504 transitions, 8973 flow. Second operand 12 states and 190 transitions. [2024-06-20 16:50:22,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 581 transitions, 11239 flow [2024-06-20 16:50:24,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 581 transitions, 10979 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 16:50:24,689 INFO L231 Difference]: Finished difference. Result has 344 places, 536 transitions, 9820 flow [2024-06-20 16:50:24,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8762, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9820, PETRI_PLACES=344, PETRI_TRANSITIONS=536} [2024-06-20 16:50:24,689 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-20 16:50:24,689 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 536 transitions, 9820 flow [2024-06-20 16:50:24,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:24,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:24,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:24,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 16:50:24,690 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:24,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:24,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1911654618, now seen corresponding path program 6 times [2024-06-20 16:50:24,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:24,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704308291] [2024-06-20 16:50:24,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:24,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:28,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:28,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:28,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704308291] [2024-06-20 16:50:28,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704308291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:28,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:28,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:28,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36091995] [2024-06-20 16:50:28,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:28,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:28,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:28,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:28,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:28,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:50:28,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 536 transitions, 9820 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:28,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:28,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:50:28,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:33,241 INFO L124 PetriNetUnfolderBase]: 7972/12728 cut-off events. [2024-06-20 16:50:33,242 INFO L125 PetriNetUnfolderBase]: For 1251683/1251693 co-relation queries the response was YES. [2024-06-20 16:50:33,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100799 conditions, 12728 events. 7972/12728 cut-off events. For 1251683/1251693 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 87412 event pairs, 3121 based on Foata normal form. 16/12744 useless extension candidates. Maximal degree in co-relation 100637. Up to 12169 conditions per place. [2024-06-20 16:50:33,404 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 471 selfloop transitions, 103 changer transitions 2/580 dead transitions. [2024-06-20 16:50:33,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 580 transitions, 11122 flow [2024-06-20 16:50:33,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:50:33,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:50:33,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 199 transitions. [2024-06-20 16:50:33,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36446886446886445 [2024-06-20 16:50:33,405 INFO L175 Difference]: Start difference. First operand has 344 places, 536 transitions, 9820 flow. Second operand 13 states and 199 transitions. [2024-06-20 16:50:33,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 580 transitions, 11122 flow [2024-06-20 16:50:36,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 580 transitions, 11008 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 16:50:36,286 INFO L231 Difference]: Finished difference. Result has 353 places, 535 transitions, 9925 flow [2024-06-20 16:50:36,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9706, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9925, PETRI_PLACES=353, PETRI_TRANSITIONS=535} [2024-06-20 16:50:36,287 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-20 16:50:36,287 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 535 transitions, 9925 flow [2024-06-20 16:50:36,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:36,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:36,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:36,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 16:50:36,288 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:36,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:36,289 INFO L85 PathProgramCache]: Analyzing trace with hash -134268362, now seen corresponding path program 7 times [2024-06-20 16:50:36,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:36,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969510557] [2024-06-20 16:50:36,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:36,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat