./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe009_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe009_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe009_power.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe009_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 13:00:23,776 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:00:23,859 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:00:23,863 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:00:23,863 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:00:23,898 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:00:23,898 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:00:23,899 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:00:23,899 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:00:23,900 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:00:23,903 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:00:23,904 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:00:23,905 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:00:23,908 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:00:23,909 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:00:23,909 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:00:23,910 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:00:23,911 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:00:23,911 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:00:23,911 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:00:23,912 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:00:23,912 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:00:23,912 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:00:23,913 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:00:23,913 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:00:23,913 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:00:23,913 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:00:23,914 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:00:23,914 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:00:23,915 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:00:23,916 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:00:23,916 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:00:23,916 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:00:23,916 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:00:23,917 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:00:23,917 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:00:23,917 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:00:23,918 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:00:23,918 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:00:23,918 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:00:23,918 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:00:23,919 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:00:23,919 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:00:23,919 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:00:24,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:00:24,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:00:24,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:00:24,192 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:00:24,193 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:00:24,194 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_power.opt.i [2024-06-14 13:00:25,330 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:00:25,581 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:00:25,582 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_power.opt.i [2024-06-14 13:00:25,597 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c19226ece/937463845ac945c29f1ec1783f021205/FLAGd050e04e2 [2024-06-14 13:00:25,612 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c19226ece/937463845ac945c29f1ec1783f021205 [2024-06-14 13:00:25,614 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:00:25,615 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:00:25,615 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe009_power.opt.yml/witness.yml [2024-06-14 13:00:25,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:00:25,877 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:00:25,879 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:00:25,880 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:00:25,884 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:00:25,885 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:00:25" (1/2) ... [2024-06-14 13:00:25,886 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16e5ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:00:25, skipping insertion in model container [2024-06-14 13:00:25,887 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:00:25" (1/2) ... [2024-06-14 13:00:25,889 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5e2ec6fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:00:25, skipping insertion in model container [2024-06-14 13:00:25,889 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:00:25" (2/2) ... [2024-06-14 13:00:25,889 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16e5ff and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:25, skipping insertion in model container [2024-06-14 13:00:25,889 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:00:25" (2/2) ... [2024-06-14 13:00:25,890 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:00:26,067 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:00:26,069 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p1_EAX$read_delayed_var && *__unbuffered_p1_EAX$read_delayed_var <= 1) && __unbuffered_p1_EAX$read_delayed_var == & x) && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$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 || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 13:00:26,069 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p1_EAX$read_delayed_var && *__unbuffered_p1_EAX$read_delayed_var <= 1) && __unbuffered_p1_EAX$read_delayed_var == & x) && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 13:00:26,069 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p1_EAX$read_delayed_var && *__unbuffered_p1_EAX$read_delayed_var <= 1) && __unbuffered_p1_EAX$read_delayed_var == & x) && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$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 || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 13:00:26,069 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:00:26,069 INFO L106 edCorrectnessWitness]: ghost_update [L849-L849] multithreaded = 1; [2024-06-14 13:00:26,115 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:00:26,538 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:00:26,551 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:00:26,711 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:00:26,759 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:00:26,760 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:26 WrapperNode [2024-06-14 13:00:26,760 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:00:26,761 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:00:26,762 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:00:26,762 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:00:26,769 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:26" (1/1) ... [2024-06-14 13:00:26,807 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:26" (1/1) ... [2024-06-14 13:00:26,852 INFO L138 Inliner]: procedures = 175, calls = 84, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 253 [2024-06-14 13:00:26,852 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:00:26,853 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:00:26,853 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:00:26,854 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:00:26,864 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:26" (1/1) ... [2024-06-14 13:00:26,865 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:26" (1/1) ... [2024-06-14 13:00:26,881 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:26" (1/1) ... [2024-06-14 13:00:26,909 INFO L175 MemorySlicer]: Split 44 memory accesses to 2 slices as follows [2, 42]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 6 writes are split as follows [0, 6]. [2024-06-14 13:00:26,916 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:26" (1/1) ... [2024-06-14 13:00:26,916 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:26" (1/1) ... [2024-06-14 13:00:26,926 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:26" (1/1) ... [2024-06-14 13:00:26,941 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:26" (1/1) ... [2024-06-14 13:00:26,954 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:26" (1/1) ... [2024-06-14 13:00:26,956 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:26" (1/1) ... [2024-06-14 13:00:26,969 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:00:26,970 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:00:26,970 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:00:26,970 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:00:26,971 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:26" (1/1) ... [2024-06-14 13:00:26,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:00:26,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:00:27,005 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 13:00:27,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 13:00:27,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 13:00:27,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 13:00:27,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 13:00:27,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 13:00:27,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:00:27,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:00:27,049 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:00:27,050 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:00:27,050 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:00:27,050 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:00:27,050 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:00:27,050 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:00:27,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:00:27,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 13:00:27,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:00:27,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:00:27,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:00:27,055 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:00:27,239 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:00:27,241 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:00:27,817 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:00:27,817 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:00:28,307 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:00:28,307 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:00:28,308 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:00:28 BoogieIcfgContainer [2024-06-14 13:00:28,308 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:00:28,310 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:00:28,310 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:00:28,313 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:00:28,314 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:00:25" (1/4) ... [2024-06-14 13:00:28,314 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e32b6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:00:28, skipping insertion in model container [2024-06-14 13:00:28,314 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:00:25" (2/4) ... [2024-06-14 13:00:28,315 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e32b6a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:00:28, skipping insertion in model container [2024-06-14 13:00:28,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:00:26" (3/4) ... [2024-06-14 13:00:28,315 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e32b6a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:00:28, skipping insertion in model container [2024-06-14 13:00:28,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:00:28" (4/4) ... [2024-06-14 13:00:28,316 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_power.opt.i [2024-06-14 13:00:28,334 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:00:28,334 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:00:28,335 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:00:28,406 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:00:28,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 13:00:28,480 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-14 13:00:28,480 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:00:28,483 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 53 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. [2024-06-14 13:00:28,483 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 13:00:28,487 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-14 13:00:28,500 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:00:28,508 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;@695535a9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:00:28,508 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:00:28,513 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:00:28,513 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:00:28,514 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:00:28,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:28,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:00:28,515 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)] === [2024-06-14 13:00:28,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:28,520 INFO L85 PathProgramCache]: Analyzing trace with hash 464996221, now seen corresponding path program 1 times [2024-06-14 13:00:28,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:28,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817566492] [2024-06-14 13:00:28,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:28,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:30,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:30,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817566492] [2024-06-14 13:00:30,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817566492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:30,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:30,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:00:30,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124950857] [2024-06-14 13:00:30,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:30,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:00:30,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:30,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:00:30,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:00:30,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:00:30,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:30,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:30,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:00:30,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:31,466 INFO L124 PetriNetUnfolderBase]: 637/1079 cut-off events. [2024-06-14 13:00:31,467 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-14 13:00:31,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2131 conditions, 1079 events. 637/1079 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5437 event pairs, 384 based on Foata normal form. 1/1034 useless extension candidates. Maximal degree in co-relation 2116. Up to 985 conditions per place. [2024-06-14 13:00:31,481 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-14 13:00:31,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 181 flow [2024-06-14 13:00:31,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:00:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:00:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-14 13:00:31,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-14 13:00:31,495 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-14 13:00:31,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 181 flow [2024-06-14 13:00:31,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:00:31,501 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-14 13:00:31,503 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} [2024-06-14 13:00:31,506 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-14 13:00:31,506 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-14 13:00:31,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:31,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:31,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:31,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:00:31,508 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)] === [2024-06-14 13:00:31,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:31,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1434580327, now seen corresponding path program 1 times [2024-06-14 13:00:31,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:31,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077813835] [2024-06-14 13:00:31,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:31,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:34,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:34,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077813835] [2024-06-14 13:00:34,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077813835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:34,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:34,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:00:34,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118561357] [2024-06-14 13:00:34,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:34,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:00:34,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:34,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:00:34,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:00:34,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:00:34,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:34,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:34,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:00:34,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:34,643 INFO L124 PetriNetUnfolderBase]: 808/1352 cut-off events. [2024-06-14 13:00:34,643 INFO L125 PetriNetUnfolderBase]: For 219/224 co-relation queries the response was YES. [2024-06-14 13:00:34,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3056 conditions, 1352 events. 808/1352 cut-off events. For 219/224 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6739 event pairs, 348 based on Foata normal form. 7/1332 useless extension candidates. Maximal degree in co-relation 3041. Up to 1202 conditions per place. [2024-06-14 13:00:34,653 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 45 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-14 13:00:34,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 262 flow [2024-06-14 13:00:34,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:00:34,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:00:34,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-14 13:00:34,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-14 13:00:34,658 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 91 transitions. [2024-06-14 13:00:34,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 262 flow [2024-06-14 13:00:34,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:00:34,662 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-14 13:00:34,663 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} [2024-06-14 13:00:34,665 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-14 13:00:34,666 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-14 13:00:34,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:34,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:34,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:34,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:00:34,672 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)] === [2024-06-14 13:00:34,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:34,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1942373155, now seen corresponding path program 1 times [2024-06-14 13:00:34,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:34,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740462083] [2024-06-14 13:00:34,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:34,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:37,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:37,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740462083] [2024-06-14 13:00:37,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740462083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:37,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:37,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:00:37,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818679725] [2024-06-14 13:00:37,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:37,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:00:37,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:37,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:00:37,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:00:37,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:00:37,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:37,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:37,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:00:37,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:38,380 INFO L124 PetriNetUnfolderBase]: 799/1337 cut-off events. [2024-06-14 13:00:38,380 INFO L125 PetriNetUnfolderBase]: For 641/651 co-relation queries the response was YES. [2024-06-14 13:00:38,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3365 conditions, 1337 events. 799/1337 cut-off events. For 641/651 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6648 event pairs, 244 based on Foata normal form. 14/1324 useless extension candidates. Maximal degree in co-relation 3348. Up to 1149 conditions per place. [2024-06-14 13:00:38,389 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 50 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2024-06-14 13:00:38,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 65 transitions, 322 flow [2024-06-14 13:00:38,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:00:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:00:38,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-06-14 13:00:38,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5095238095238095 [2024-06-14 13:00:38,395 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 107 transitions. [2024-06-14 13:00:38,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 65 transitions, 322 flow [2024-06-14 13:00:38,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 65 transitions, 308 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 13:00:38,399 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 159 flow [2024-06-14 13:00:38,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2024-06-14 13:00:38,400 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2024-06-14 13:00:38,400 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 159 flow [2024-06-14 13:00:38,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:38,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:38,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:38,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:00:38,401 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:00:38,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:38,402 INFO L85 PathProgramCache]: Analyzing trace with hash 129534259, now seen corresponding path program 1 times [2024-06-14 13:00:38,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:38,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746185020] [2024-06-14 13:00:38,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:38,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:40,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:40,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746185020] [2024-06-14 13:00:40,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746185020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:40,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:40,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:00:40,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586169973] [2024-06-14 13:00:40,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:40,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:00:40,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:40,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:00:40,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:00:40,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:00:40,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 159 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:40,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:40,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:00:40,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:41,522 INFO L124 PetriNetUnfolderBase]: 617/1047 cut-off events. [2024-06-14 13:00:41,522 INFO L125 PetriNetUnfolderBase]: For 885/885 co-relation queries the response was YES. [2024-06-14 13:00:41,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2888 conditions, 1047 events. 617/1047 cut-off events. For 885/885 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5260 event pairs, 253 based on Foata normal form. 2/1026 useless extension candidates. Maximal degree in co-relation 2870. Up to 943 conditions per place. [2024-06-14 13:00:41,529 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-14 13:00:41,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 57 transitions, 307 flow [2024-06-14 13:00:41,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:00:41,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:00:41,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-14 13:00:41,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-14 13:00:41,531 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 159 flow. Second operand 5 states and 97 transitions. [2024-06-14 13:00:41,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 57 transitions, 307 flow [2024-06-14 13:00:41,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 57 transitions, 284 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 13:00:41,536 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 180 flow [2024-06-14 13:00:41,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=180, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-14 13:00:41,537 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-14 13:00:41,537 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 180 flow [2024-06-14 13:00:41,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:41,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:41,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:41,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:00:41,539 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)] === [2024-06-14 13:00:41,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:41,539 INFO L85 PathProgramCache]: Analyzing trace with hash -299065228, now seen corresponding path program 1 times [2024-06-14 13:00:41,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:41,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864881922] [2024-06-14 13:00:41,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:41,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:44,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:44,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864881922] [2024-06-14 13:00:44,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864881922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:44,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:44,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:00:44,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896717142] [2024-06-14 13:00:44,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:44,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:00:44,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:44,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:00:44,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:00:44,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:00:44,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 180 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:44,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:44,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:00:44,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:45,169 INFO L124 PetriNetUnfolderBase]: 821/1376 cut-off events. [2024-06-14 13:00:45,169 INFO L125 PetriNetUnfolderBase]: For 1672/1672 co-relation queries the response was YES. [2024-06-14 13:00:45,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3935 conditions, 1376 events. 821/1376 cut-off events. For 1672/1672 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6896 event pairs, 264 based on Foata normal form. 15/1389 useless extension candidates. Maximal degree in co-relation 3915. Up to 1069 conditions per place. [2024-06-14 13:00:45,180 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 67 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2024-06-14 13:00:45,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 83 transitions, 475 flow [2024-06-14 13:00:45,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:00:45,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:00:45,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-14 13:00:45,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-14 13:00:45,186 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 180 flow. Second operand 6 states and 120 transitions. [2024-06-14 13:00:45,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 83 transitions, 475 flow [2024-06-14 13:00:45,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 83 transitions, 444 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 13:00:45,193 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 244 flow [2024-06-14 13:00:45,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=244, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-14 13:00:45,196 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-14 13:00:45,196 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 244 flow [2024-06-14 13:00:45,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:45,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:45,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:45,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:00:45,197 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)] === [2024-06-14 13:00:45,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:45,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1781793829, now seen corresponding path program 1 times [2024-06-14 13:00:45,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:45,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367366280] [2024-06-14 13:00:45,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:45,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:48,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:48,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367366280] [2024-06-14 13:00:48,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367366280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:48,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:48,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:00:48,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825814092] [2024-06-14 13:00:48,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:48,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:00:48,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:48,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:00:48,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:00:49,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:00:49,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 244 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-14 13:00:49,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:49,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:00:49,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:49,669 INFO L124 PetriNetUnfolderBase]: 834/1415 cut-off events. [2024-06-14 13:00:49,669 INFO L125 PetriNetUnfolderBase]: For 2676/2700 co-relation queries the response was YES. [2024-06-14 13:00:49,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4514 conditions, 1415 events. 834/1415 cut-off events. For 2676/2700 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7226 event pairs, 306 based on Foata normal form. 17/1417 useless extension candidates. Maximal degree in co-relation 4491. Up to 1193 conditions per place. [2024-06-14 13:00:49,678 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 17 changer transitions 0/83 dead transitions. [2024-06-14 13:00:49,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 83 transitions, 532 flow [2024-06-14 13:00:49,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:00:49,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:00:49,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-14 13:00:49,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-14 13:00:49,679 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 244 flow. Second operand 6 states and 119 transitions. [2024-06-14 13:00:49,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 83 transitions, 532 flow [2024-06-14 13:00:49,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 83 transitions, 516 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 13:00:49,685 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 322 flow [2024-06-14 13:00:49,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=322, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-14 13:00:49,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-14 13:00:49,686 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 322 flow [2024-06-14 13:00:49,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-14 13:00:49,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:49,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:49,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:00:49,687 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)] === [2024-06-14 13:00:49,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:49,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1599056913, now seen corresponding path program 1 times [2024-06-14 13:00:49,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:49,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206971370] [2024-06-14 13:00:49,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:49,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:52,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:52,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206971370] [2024-06-14 13:00:52,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206971370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:52,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:52,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:00:52,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556138164] [2024-06-14 13:00:52,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:52,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:00:52,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:52,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:00:52,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:00:52,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:00:52,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 322 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-14 13:00:52,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:52,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:00:52,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:53,758 INFO L124 PetriNetUnfolderBase]: 1008/1680 cut-off events. [2024-06-14 13:00:53,759 INFO L125 PetriNetUnfolderBase]: For 4221/4231 co-relation queries the response was YES. [2024-06-14 13:00:53,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5659 conditions, 1680 events. 1008/1680 cut-off events. For 4221/4231 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8762 event pairs, 246 based on Foata normal form. 23/1699 useless extension candidates. Maximal degree in co-relation 5634. Up to 1132 conditions per place. [2024-06-14 13:00:53,770 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 69 selfloop transitions, 22 changer transitions 0/97 dead transitions. [2024-06-14 13:00:53,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 97 transitions, 660 flow [2024-06-14 13:00:53,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:53,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:53,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 13:00:53,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-14 13:00:53,772 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 322 flow. Second operand 8 states and 149 transitions. [2024-06-14 13:00:53,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 97 transitions, 660 flow [2024-06-14 13:00:53,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 97 transitions, 633 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 13:00:53,779 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 435 flow [2024-06-14 13:00:53,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=435, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-06-14 13:00:53,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-14 13:00:53,780 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 435 flow [2024-06-14 13:00:53,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-14 13:00:53,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:53,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:53,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:00:53,781 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)] === [2024-06-14 13:00:53,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:53,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1578731577, now seen corresponding path program 2 times [2024-06-14 13:00:53,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:53,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308809541] [2024-06-14 13:00:53,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:53,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:56,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:56,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308809541] [2024-06-14 13:00:56,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308809541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:56,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:56,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:00:56,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362754869] [2024-06-14 13:00:56,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:56,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:00:56,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:56,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:00:56,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:00:56,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:00:56,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 435 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-14 13:00:56,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:56,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:00:56,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:57,365 INFO L124 PetriNetUnfolderBase]: 1003/1691 cut-off events. [2024-06-14 13:00:57,365 INFO L125 PetriNetUnfolderBase]: For 5929/5939 co-relation queries the response was YES. [2024-06-14 13:00:57,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6442 conditions, 1691 events. 1003/1691 cut-off events. For 5929/5939 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8928 event pairs, 368 based on Foata normal form. 10/1685 useless extension candidates. Maximal degree in co-relation 6413. Up to 1482 conditions per place. [2024-06-14 13:00:57,380 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 64 selfloop transitions, 13 changer transitions 0/83 dead transitions. [2024-06-14 13:00:57,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 83 transitions, 635 flow [2024-06-14 13:00:57,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:00:57,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:00:57,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-14 13:00:57,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 13:00:57,382 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 435 flow. Second operand 6 states and 112 transitions. [2024-06-14 13:00:57,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 83 transitions, 635 flow [2024-06-14 13:00:57,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 83 transitions, 596 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 13:00:57,395 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 430 flow [2024-06-14 13:00:57,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=430, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2024-06-14 13:00:57,397 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-14 13:00:57,397 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 430 flow [2024-06-14 13:00:57,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-14 13:00:57,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:57,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:57,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:00:57,398 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)] === [2024-06-14 13:00:57,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:57,399 INFO L85 PathProgramCache]: Analyzing trace with hash 2076554463, now seen corresponding path program 2 times [2024-06-14 13:00:57,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:57,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348507139] [2024-06-14 13:00:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:57,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:00,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:00,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348507139] [2024-06-14 13:01:00,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348507139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:00,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:00,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:01:00,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877870988] [2024-06-14 13:01:00,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:00,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:01:00,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:00,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:01:00,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:01:00,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:01:00,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 430 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-14 13:01:00,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:00,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:01:00,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:01,381 INFO L124 PetriNetUnfolderBase]: 1089/1814 cut-off events. [2024-06-14 13:01:01,381 INFO L125 PetriNetUnfolderBase]: For 6869/6876 co-relation queries the response was YES. [2024-06-14 13:01:01,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6887 conditions, 1814 events. 1089/1814 cut-off events. For 6869/6876 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9694 event pairs, 268 based on Foata normal form. 21/1831 useless extension candidates. Maximal degree in co-relation 6856. Up to 941 conditions per place. [2024-06-14 13:01:01,392 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 80 selfloop transitions, 25 changer transitions 0/111 dead transitions. [2024-06-14 13:01:01,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 111 transitions, 842 flow [2024-06-14 13:01:01,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:01:01,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:01:01,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-14 13:01:01,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-14 13:01:01,394 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 430 flow. Second operand 7 states and 143 transitions. [2024-06-14 13:01:01,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 111 transitions, 842 flow [2024-06-14 13:01:01,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 111 transitions, 794 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:01:01,402 INFO L231 Difference]: Finished difference. Result has 74 places, 70 transitions, 538 flow [2024-06-14 13:01:01,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=538, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2024-06-14 13:01:01,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-14 13:01:01,403 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 538 flow [2024-06-14 13:01:01,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-14 13:01:01,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:01,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:01,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:01:01,404 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)] === [2024-06-14 13:01:01,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:01,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1989550731, now seen corresponding path program 1 times [2024-06-14 13:01:01,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:01,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607240392] [2024-06-14 13:01:01,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:01,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:04,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:04,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607240392] [2024-06-14 13:01:04,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607240392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:04,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:04,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:04,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135364387] [2024-06-14 13:01:04,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:04,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:04,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:04,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:04,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:05,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:01:05,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 538 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:05,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:05,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:01:05,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:06,141 INFO L124 PetriNetUnfolderBase]: 1137/1913 cut-off events. [2024-06-14 13:01:06,141 INFO L125 PetriNetUnfolderBase]: For 9074/9105 co-relation queries the response was YES. [2024-06-14 13:01:06,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7898 conditions, 1913 events. 1137/1913 cut-off events. For 9074/9105 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10401 event pairs, 337 based on Foata normal form. 27/1917 useless extension candidates. Maximal degree in co-relation 7864. Up to 1579 conditions per place. [2024-06-14 13:01:06,163 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 80 selfloop transitions, 20 changer transitions 0/106 dead transitions. [2024-06-14 13:01:06,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 106 transitions, 902 flow [2024-06-14 13:01:06,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:01:06,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:01:06,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 13:01:06,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-14 13:01:06,166 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 538 flow. Second operand 7 states and 137 transitions. [2024-06-14 13:01:06,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 106 transitions, 902 flow [2024-06-14 13:01:06,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 106 transitions, 856 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-14 13:01:06,185 INFO L231 Difference]: Finished difference. Result has 79 places, 74 transitions, 599 flow [2024-06-14 13:01:06,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=599, PETRI_PLACES=79, PETRI_TRANSITIONS=74} [2024-06-14 13:01:06,186 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-14 13:01:06,188 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 599 flow [2024-06-14 13:01:06,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:06,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:06,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:06,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:01:06,189 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)] === [2024-06-14 13:01:06,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:06,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1692321660, now seen corresponding path program 1 times [2024-06-14 13:01:06,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:06,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834232136] [2024-06-14 13:01:06,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:06,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:09,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:09,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834232136] [2024-06-14 13:01:09,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834232136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:09,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:09,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:09,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601445826] [2024-06-14 13:01:09,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:09,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:09,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:09,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:09,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:01:09,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 599 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:09,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:09,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:01:09,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:10,903 INFO L124 PetriNetUnfolderBase]: 1432/2418 cut-off events. [2024-06-14 13:01:10,904 INFO L125 PetriNetUnfolderBase]: For 12464/12495 co-relation queries the response was YES. [2024-06-14 13:01:10,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9436 conditions, 2418 events. 1432/2418 cut-off events. For 12464/12495 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 13909 event pairs, 325 based on Foata normal form. 38/2452 useless extension candidates. Maximal degree in co-relation 9400. Up to 1716 conditions per place. [2024-06-14 13:01:10,920 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 112 selfloop transitions, 27 changer transitions 0/145 dead transitions. [2024-06-14 13:01:10,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 145 transitions, 1291 flow [2024-06-14 13:01:10,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:01:10,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:01:10,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 13:01:10,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2024-06-14 13:01:10,922 INFO L175 Difference]: Start difference. First operand has 79 places, 74 transitions, 599 flow. Second operand 8 states and 170 transitions. [2024-06-14 13:01:10,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 145 transitions, 1291 flow [2024-06-14 13:01:10,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 145 transitions, 1248 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 13:01:10,942 INFO L231 Difference]: Finished difference. Result has 87 places, 88 transitions, 783 flow [2024-06-14 13:01:10,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=783, PETRI_PLACES=87, PETRI_TRANSITIONS=88} [2024-06-14 13:01:10,943 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-14 13:01:10,943 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 88 transitions, 783 flow [2024-06-14 13:01:10,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:10,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:10,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:10,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:01:10,944 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)] === [2024-06-14 13:01:10,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:10,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1692321505, now seen corresponding path program 2 times [2024-06-14 13:01:10,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:10,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792920173] [2024-06-14 13:01:10,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:10,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:14,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:14,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792920173] [2024-06-14 13:01:14,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792920173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:14,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:14,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:14,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113775485] [2024-06-14 13:01:14,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:14,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:14,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:14,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:14,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:14,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:01:14,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 88 transitions, 783 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:14,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:14,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:01:14,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:15,828 INFO L124 PetriNetUnfolderBase]: 1424/2411 cut-off events. [2024-06-14 13:01:15,828 INFO L125 PetriNetUnfolderBase]: For 14736/14747 co-relation queries the response was YES. [2024-06-14 13:01:15,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10625 conditions, 2411 events. 1424/2411 cut-off events. For 14736/14747 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 13818 event pairs, 407 based on Foata normal form. 14/2417 useless extension candidates. Maximal degree in co-relation 10584. Up to 2112 conditions per place. [2024-06-14 13:01:15,845 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 99 selfloop transitions, 14 changer transitions 0/119 dead transitions. [2024-06-14 13:01:15,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 119 transitions, 1111 flow [2024-06-14 13:01:15,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:01:15,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:01:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 13:01:15,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-14 13:01:15,848 INFO L175 Difference]: Start difference. First operand has 87 places, 88 transitions, 783 flow. Second operand 7 states and 132 transitions. [2024-06-14 13:01:15,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 119 transitions, 1111 flow [2024-06-14 13:01:15,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 119 transitions, 1076 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-14 13:01:15,868 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 819 flow [2024-06-14 13:01:15,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=819, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2024-06-14 13:01:15,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-14 13:01:15,869 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 819 flow [2024-06-14 13:01:15,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:15,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:15,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:15,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:01:15,872 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)] === [2024-06-14 13:01:15,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:15,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1696046310, now seen corresponding path program 2 times [2024-06-14 13:01:15,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:15,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082406317] [2024-06-14 13:01:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:15,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:18,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:18,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082406317] [2024-06-14 13:01:18,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082406317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:18,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:18,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:18,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51870552] [2024-06-14 13:01:18,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:18,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:18,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:18,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:18,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:18,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:01:18,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 90 transitions, 819 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:18,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:18,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:01:18,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:19,841 INFO L124 PetriNetUnfolderBase]: 1502/2542 cut-off events. [2024-06-14 13:01:19,842 INFO L125 PetriNetUnfolderBase]: For 17568/17579 co-relation queries the response was YES. [2024-06-14 13:01:19,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11302 conditions, 2542 events. 1502/2542 cut-off events. For 17568/17579 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14753 event pairs, 395 based on Foata normal form. 25/2565 useless extension candidates. Maximal degree in co-relation 11259. Up to 2118 conditions per place. [2024-06-14 13:01:19,859 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 98 selfloop transitions, 29 changer transitions 0/133 dead transitions. [2024-06-14 13:01:19,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 133 transitions, 1331 flow [2024-06-14 13:01:19,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:01:19,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:01:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:01:19,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-14 13:01:19,861 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 819 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:01:19,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 133 transitions, 1331 flow [2024-06-14 13:01:19,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 133 transitions, 1278 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 13:01:19,885 INFO L231 Difference]: Finished difference. Result has 99 places, 101 transitions, 1010 flow [2024-06-14 13:01:19,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1010, PETRI_PLACES=99, PETRI_TRANSITIONS=101} [2024-06-14 13:01:19,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-14 13:01:19,886 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 101 transitions, 1010 flow [2024-06-14 13:01:19,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:19,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:19,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:19,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:01:19,887 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)] === [2024-06-14 13:01:19,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:19,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1989402861, now seen corresponding path program 3 times [2024-06-14 13:01:19,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:19,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920748786] [2024-06-14 13:01:19,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:19,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:22,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:22,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920748786] [2024-06-14 13:01:22,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920748786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:22,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:22,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:22,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950399811] [2024-06-14 13:01:22,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:22,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:22,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:22,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:22,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:22,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:01:22,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 101 transitions, 1010 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:22,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:22,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:01:22,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:24,005 INFO L124 PetriNetUnfolderBase]: 1626/2752 cut-off events. [2024-06-14 13:01:24,005 INFO L125 PetriNetUnfolderBase]: For 21112/21123 co-relation queries the response was YES. [2024-06-14 13:01:24,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12750 conditions, 2752 events. 1626/2752 cut-off events. For 21112/21123 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 16188 event pairs, 383 based on Foata normal form. 14/2758 useless extension candidates. Maximal degree in co-relation 12703. Up to 2074 conditions per place. [2024-06-14 13:01:24,024 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 105 selfloop transitions, 38 changer transitions 0/149 dead transitions. [2024-06-14 13:01:24,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 149 transitions, 1560 flow [2024-06-14 13:01:24,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:01:24,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:01:24,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 13:01:24,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-14 13:01:24,027 INFO L175 Difference]: Start difference. First operand has 99 places, 101 transitions, 1010 flow. Second operand 8 states and 157 transitions. [2024-06-14 13:01:24,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 149 transitions, 1560 flow [2024-06-14 13:01:24,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 149 transitions, 1455 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 13:01:24,058 INFO L231 Difference]: Finished difference. Result has 103 places, 111 transitions, 1160 flow [2024-06-14 13:01:24,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1160, PETRI_PLACES=103, PETRI_TRANSITIONS=111} [2024-06-14 13:01:24,058 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-14 13:01:24,059 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 111 transitions, 1160 flow [2024-06-14 13:01:24,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:24,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:24,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:24,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:01:24,060 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)] === [2024-06-14 13:01:24,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:24,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1989402706, now seen corresponding path program 3 times [2024-06-14 13:01:24,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:24,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161088685] [2024-06-14 13:01:24,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:24,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:26,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:26,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161088685] [2024-06-14 13:01:26,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161088685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:26,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:26,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:26,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655536455] [2024-06-14 13:01:26,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:26,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:26,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:26,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:26,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:26,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:01:26,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 111 transitions, 1160 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:26,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:26,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:01:26,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:27,898 INFO L124 PetriNetUnfolderBase]: 1658/2794 cut-off events. [2024-06-14 13:01:27,898 INFO L125 PetriNetUnfolderBase]: For 25206/25221 co-relation queries the response was YES. [2024-06-14 13:01:27,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13960 conditions, 2794 events. 1658/2794 cut-off events. For 25206/25221 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 16449 event pairs, 399 based on Foata normal form. 29/2821 useless extension candidates. Maximal degree in co-relation 13911. Up to 2163 conditions per place. [2024-06-14 13:01:27,919 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 122 selfloop transitions, 35 changer transitions 0/163 dead transitions. [2024-06-14 13:01:27,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 163 transitions, 1823 flow [2024-06-14 13:01:27,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:01:27,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:01:27,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 13:01:27,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-14 13:01:27,921 INFO L175 Difference]: Start difference. First operand has 103 places, 111 transitions, 1160 flow. Second operand 9 states and 173 transitions. [2024-06-14 13:01:27,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 163 transitions, 1823 flow [2024-06-14 13:01:27,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 163 transitions, 1778 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:01:27,966 INFO L231 Difference]: Finished difference. Result has 108 places, 119 transitions, 1367 flow [2024-06-14 13:01:27,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1125, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1367, PETRI_PLACES=108, PETRI_TRANSITIONS=119} [2024-06-14 13:01:27,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-14 13:01:27,967 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 119 transitions, 1367 flow [2024-06-14 13:01:27,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:27,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:27,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:27,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:01:27,968 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)] === [2024-06-14 13:01:27,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:27,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1688196378, now seen corresponding path program 4 times [2024-06-14 13:01:27,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:27,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319692220] [2024-06-14 13:01:27,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:27,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:30,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:30,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319692220] [2024-06-14 13:01:30,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319692220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:30,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:30,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:30,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388181452] [2024-06-14 13:01:30,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:30,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:30,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:30,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:30,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:30,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:01:30,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 119 transitions, 1367 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:30,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:30,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:01:30,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:31,694 INFO L124 PetriNetUnfolderBase]: 1690/2876 cut-off events. [2024-06-14 13:01:31,694 INFO L125 PetriNetUnfolderBase]: For 29077/29092 co-relation queries the response was YES. [2024-06-14 13:01:31,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14653 conditions, 2876 events. 1690/2876 cut-off events. For 29077/29092 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 17189 event pairs, 404 based on Foata normal form. 29/2900 useless extension candidates. Maximal degree in co-relation 14601. Up to 2368 conditions per place. [2024-06-14 13:01:31,712 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 128 selfloop transitions, 41 changer transitions 0/175 dead transitions. [2024-06-14 13:01:31,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 175 transitions, 2091 flow [2024-06-14 13:01:31,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:01:31,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:01:31,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 13:01:31,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-14 13:01:31,715 INFO L175 Difference]: Start difference. First operand has 108 places, 119 transitions, 1367 flow. Second operand 8 states and 158 transitions. [2024-06-14 13:01:31,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 175 transitions, 2091 flow [2024-06-14 13:01:31,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 175 transitions, 1999 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 13:01:31,764 INFO L231 Difference]: Finished difference. Result has 115 places, 139 transitions, 1658 flow [2024-06-14 13:01:31,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1658, PETRI_PLACES=115, PETRI_TRANSITIONS=139} [2024-06-14 13:01:31,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-14 13:01:31,765 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 139 transitions, 1658 flow [2024-06-14 13:01:31,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:31,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:31,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:31,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:01:31,765 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:01:31,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:31,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1958280602, now seen corresponding path program 1 times [2024-06-14 13:01:31,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:31,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765921449] [2024-06-14 13:01:31,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:31,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:31,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:32,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:32,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765921449] [2024-06-14 13:01:32,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765921449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:32,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:32,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:01:32,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318968090] [2024-06-14 13:01:32,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:32,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:01:32,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:32,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:01:32,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:01:32,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:01:32,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 139 transitions, 1658 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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) [2024-06-14 13:01:32,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:32,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:01:32,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:33,903 INFO L124 PetriNetUnfolderBase]: 1682/2849 cut-off events. [2024-06-14 13:01:33,903 INFO L125 PetriNetUnfolderBase]: For 30014/30014 co-relation queries the response was YES. [2024-06-14 13:01:33,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15427 conditions, 2849 events. 1682/2849 cut-off events. For 30014/30014 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 16932 event pairs, 407 based on Foata normal form. 3/2845 useless extension candidates. Maximal degree in co-relation 15369. Up to 2576 conditions per place. [2024-06-14 13:01:33,923 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 137 selfloop transitions, 9 changer transitions 0/152 dead transitions. [2024-06-14 13:01:33,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 152 transitions, 1998 flow [2024-06-14 13:01:33,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:01:33,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:01:33,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-14 13:01:33,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-14 13:01:33,924 INFO L175 Difference]: Start difference. First operand has 115 places, 139 transitions, 1658 flow. Second operand 5 states and 89 transitions. [2024-06-14 13:01:33,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 152 transitions, 1998 flow [2024-06-14 13:01:33,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 152 transitions, 1906 flow, removed 45 selfloop flow, removed 1 redundant places. [2024-06-14 13:01:33,973 INFO L231 Difference]: Finished difference. Result has 120 places, 140 transitions, 1609 flow [2024-06-14 13:01:33,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1609, PETRI_PLACES=120, PETRI_TRANSITIONS=140} [2024-06-14 13:01:33,974 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-14 13:01:33,974 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 140 transitions, 1609 flow [2024-06-14 13:01:33,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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) [2024-06-14 13:01:33,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:33,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:33,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:01:33,974 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)] === [2024-06-14 13:01:33,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:33,975 INFO L85 PathProgramCache]: Analyzing trace with hash 434656438, now seen corresponding path program 1 times [2024-06-14 13:01:33,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:33,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073685820] [2024-06-14 13:01:33,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:33,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:38,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:38,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073685820] [2024-06-14 13:01:38,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073685820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:38,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:38,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:38,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234322440] [2024-06-14 13:01:38,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:38,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:38,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:38,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:38,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:38,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:01:38,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 140 transitions, 1609 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:38,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:38,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:01:38,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:39,663 INFO L124 PetriNetUnfolderBase]: 2122/3696 cut-off events. [2024-06-14 13:01:39,664 INFO L125 PetriNetUnfolderBase]: For 47015/47066 co-relation queries the response was YES. [2024-06-14 13:01:39,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19306 conditions, 3696 events. 2122/3696 cut-off events. For 47015/47066 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 24231 event pairs, 403 based on Foata normal form. 68/3760 useless extension candidates. Maximal degree in co-relation 19244. Up to 1717 conditions per place. [2024-06-14 13:01:39,691 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 159 selfloop transitions, 44 changer transitions 0/209 dead transitions. [2024-06-14 13:01:39,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 209 transitions, 2481 flow [2024-06-14 13:01:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:01:39,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:01:39,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 13:01:39,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-14 13:01:39,693 INFO L175 Difference]: Start difference. First operand has 120 places, 140 transitions, 1609 flow. Second operand 9 states and 195 transitions. [2024-06-14 13:01:39,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 209 transitions, 2481 flow [2024-06-14 13:01:39,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 209 transitions, 2459 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 13:01:39,749 INFO L231 Difference]: Finished difference. Result has 128 places, 143 transitions, 1779 flow [2024-06-14 13:01:39,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1587, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1779, PETRI_PLACES=128, PETRI_TRANSITIONS=143} [2024-06-14 13:01:39,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-14 13:01:39,750 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 143 transitions, 1779 flow [2024-06-14 13:01:39,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:39,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:39,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:39,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:01:39,751 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)] === [2024-06-14 13:01:39,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:39,752 INFO L85 PathProgramCache]: Analyzing trace with hash 922365852, now seen corresponding path program 2 times [2024-06-14 13:01:39,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:39,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087830854] [2024-06-14 13:01:39,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:39,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:43,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:43,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087830854] [2024-06-14 13:01:43,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087830854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:43,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:43,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:43,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811408731] [2024-06-14 13:01:43,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:43,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:43,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:43,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:43,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:43,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:01:43,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 143 transitions, 1779 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:43,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:43,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:01:43,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:45,195 INFO L124 PetriNetUnfolderBase]: 2233/3951 cut-off events. [2024-06-14 13:01:45,195 INFO L125 PetriNetUnfolderBase]: For 55805/55856 co-relation queries the response was YES. [2024-06-14 13:01:45,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21036 conditions, 3951 events. 2233/3951 cut-off events. For 55805/55856 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 26901 event pairs, 655 based on Foata normal form. 68/4015 useless extension candidates. Maximal degree in co-relation 20971. Up to 2689 conditions per place. [2024-06-14 13:01:45,223 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 158 selfloop transitions, 40 changer transitions 0/204 dead transitions. [2024-06-14 13:01:45,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 204 transitions, 2499 flow [2024-06-14 13:01:45,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:01:45,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:01:45,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 13:01:45,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 13:01:45,225 INFO L175 Difference]: Start difference. First operand has 128 places, 143 transitions, 1779 flow. Second operand 9 states and 189 transitions. [2024-06-14 13:01:45,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 204 transitions, 2499 flow [2024-06-14 13:01:45,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 204 transitions, 2409 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 13:01:45,291 INFO L231 Difference]: Finished difference. Result has 132 places, 144 transitions, 1809 flow [2024-06-14 13:01:45,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1809, PETRI_PLACES=132, PETRI_TRANSITIONS=144} [2024-06-14 13:01:45,291 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-14 13:01:45,292 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 144 transitions, 1809 flow [2024-06-14 13:01:45,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:45,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:45,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:45,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:01:45,292 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)] === [2024-06-14 13:01:45,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:45,293 INFO L85 PathProgramCache]: Analyzing trace with hash 922361202, now seen corresponding path program 3 times [2024-06-14 13:01:45,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:45,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300621689] [2024-06-14 13:01:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:45,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:49,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:49,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300621689] [2024-06-14 13:01:49,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300621689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:49,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:49,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:49,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341269090] [2024-06-14 13:01:49,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:49,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:49,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:49,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:49,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:49,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:01:49,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 144 transitions, 1809 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:49,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:49,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:01:49,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:50,874 INFO L124 PetriNetUnfolderBase]: 2458/4393 cut-off events. [2024-06-14 13:01:50,874 INFO L125 PetriNetUnfolderBase]: For 63604/63621 co-relation queries the response was YES. [2024-06-14 13:01:50,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23132 conditions, 4393 events. 2458/4393 cut-off events. For 63604/63621 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 31036 event pairs, 708 based on Foata normal form. 46/4437 useless extension candidates. Maximal degree in co-relation 23066. Up to 2955 conditions per place. [2024-06-14 13:01:50,906 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 171 selfloop transitions, 24 changer transitions 0/201 dead transitions. [2024-06-14 13:01:50,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 201 transitions, 2564 flow [2024-06-14 13:01:50,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:01:50,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:01:50,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-14 13:01:50,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-14 13:01:50,908 INFO L175 Difference]: Start difference. First operand has 132 places, 144 transitions, 1809 flow. Second operand 9 states and 180 transitions. [2024-06-14 13:01:50,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 201 transitions, 2564 flow [2024-06-14 13:01:50,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 201 transitions, 2458 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 13:01:50,997 INFO L231 Difference]: Finished difference. Result has 135 places, 146 transitions, 1820 flow [2024-06-14 13:01:50,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1820, PETRI_PLACES=135, PETRI_TRANSITIONS=146} [2024-06-14 13:01:50,998 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-14 13:01:50,998 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 146 transitions, 1820 flow [2024-06-14 13:01:50,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:50,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:50,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:50,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:01:50,999 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)] === [2024-06-14 13:01:50,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:50,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1541760122, now seen corresponding path program 1 times [2024-06-14 13:01:50,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:51,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568017270] [2024-06-14 13:01:51,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:51,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:53,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:53,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568017270] [2024-06-14 13:01:53,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568017270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:53,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:53,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:53,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144310433] [2024-06-14 13:01:53,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:53,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:53,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:53,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:53,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:53,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:01:53,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 146 transitions, 1820 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:53,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:53,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:01:53,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:55,767 INFO L124 PetriNetUnfolderBase]: 2532/4488 cut-off events. [2024-06-14 13:01:55,767 INFO L125 PetriNetUnfolderBase]: For 66281/66298 co-relation queries the response was YES. [2024-06-14 13:01:55,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23757 conditions, 4488 events. 2532/4488 cut-off events. For 66281/66298 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 31539 event pairs, 845 based on Foata normal form. 32/4518 useless extension candidates. Maximal degree in co-relation 23689. Up to 3441 conditions per place. [2024-06-14 13:01:55,804 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 144 selfloop transitions, 42 changer transitions 0/192 dead transitions. [2024-06-14 13:01:55,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 192 transitions, 2462 flow [2024-06-14 13:01:55,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:01:55,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:01:55,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 13:01:55,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-14 13:01:55,805 INFO L175 Difference]: Start difference. First operand has 135 places, 146 transitions, 1820 flow. Second operand 9 states and 169 transitions. [2024-06-14 13:01:55,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 192 transitions, 2462 flow [2024-06-14 13:01:55,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 192 transitions, 2351 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 13:01:55,904 INFO L231 Difference]: Finished difference. Result has 137 places, 149 transitions, 1868 flow [2024-06-14 13:01:55,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1868, PETRI_PLACES=137, PETRI_TRANSITIONS=149} [2024-06-14 13:01:55,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-14 13:01:55,905 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 149 transitions, 1868 flow [2024-06-14 13:01:55,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:55,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:55,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:55,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:01:55,905 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)] === [2024-06-14 13:01:55,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:55,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1037652372, now seen corresponding path program 4 times [2024-06-14 13:01:55,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:55,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299667689] [2024-06-14 13:01:55,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:55,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:58,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:58,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299667689] [2024-06-14 13:01:58,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299667689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:58,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:58,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:58,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122607296] [2024-06-14 13:01:58,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:58,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:58,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:58,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:58,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:58,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:01:58,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 149 transitions, 1868 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:58,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:58,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:01:58,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:00,778 INFO L124 PetriNetUnfolderBase]: 3035/5446 cut-off events. [2024-06-14 13:02:00,778 INFO L125 PetriNetUnfolderBase]: For 88101/88118 co-relation queries the response was YES. [2024-06-14 13:02:00,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28696 conditions, 5446 events. 3035/5446 cut-off events. For 88101/88118 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 40672 event pairs, 885 based on Foata normal form. 58/5502 useless extension candidates. Maximal degree in co-relation 28628. Up to 2925 conditions per place. [2024-06-14 13:02:00,818 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 181 selfloop transitions, 42 changer transitions 0/229 dead transitions. [2024-06-14 13:02:00,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 229 transitions, 3014 flow [2024-06-14 13:02:00,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:02:00,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:02:00,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-14 13:02:00,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2024-06-14 13:02:00,820 INFO L175 Difference]: Start difference. First operand has 137 places, 149 transitions, 1868 flow. Second operand 11 states and 219 transitions. [2024-06-14 13:02:00,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 229 transitions, 3014 flow [2024-06-14 13:02:00,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 229 transitions, 2878 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 13:02:00,947 INFO L231 Difference]: Finished difference. Result has 144 places, 159 transitions, 2058 flow [2024-06-14 13:02:00,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1757, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2058, PETRI_PLACES=144, PETRI_TRANSITIONS=159} [2024-06-14 13:02:00,948 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-14 13:02:00,948 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 159 transitions, 2058 flow [2024-06-14 13:02:00,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:00,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:00,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:00,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:02:00,948 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)] === [2024-06-14 13:02:00,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:00,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1541766818, now seen corresponding path program 5 times [2024-06-14 13:02:00,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:00,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923316611] [2024-06-14 13:02:00,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:00,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:03,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:03,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923316611] [2024-06-14 13:02:03,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923316611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:03,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:03,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:03,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622964175] [2024-06-14 13:02:03,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:03,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:03,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:03,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:03,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:03,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:02:03,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 159 transitions, 2058 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:03,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:03,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:02:03,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:06,006 INFO L124 PetriNetUnfolderBase]: 3215/5811 cut-off events. [2024-06-14 13:02:06,006 INFO L125 PetriNetUnfolderBase]: For 103103/103120 co-relation queries the response was YES. [2024-06-14 13:02:06,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30718 conditions, 5811 events. 3215/5811 cut-off events. For 103103/103120 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 44291 event pairs, 1110 based on Foata normal form. 70/5875 useless extension candidates. Maximal degree in co-relation 30646. Up to 4251 conditions per place. [2024-06-14 13:02:06,047 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 169 selfloop transitions, 63 changer transitions 0/238 dead transitions. [2024-06-14 13:02:06,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 238 transitions, 3184 flow [2024-06-14 13:02:06,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:02:06,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:02:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 228 transitions. [2024-06-14 13:02:06,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 13:02:06,049 INFO L175 Difference]: Start difference. First operand has 144 places, 159 transitions, 2058 flow. Second operand 12 states and 228 transitions. [2024-06-14 13:02:06,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 238 transitions, 3184 flow [2024-06-14 13:02:06,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 238 transitions, 3099 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 13:02:06,215 INFO L231 Difference]: Finished difference. Result has 153 places, 181 transitions, 2524 flow [2024-06-14 13:02:06,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2524, PETRI_PLACES=153, PETRI_TRANSITIONS=181} [2024-06-14 13:02:06,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-14 13:02:06,216 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 181 transitions, 2524 flow [2024-06-14 13:02:06,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:06,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:06,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:06,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:02:06,217 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)] === [2024-06-14 13:02:06,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:06,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1541939798, now seen corresponding path program 6 times [2024-06-14 13:02:06,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:06,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809186057] [2024-06-14 13:02:06,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:06,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:08,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:08,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:08,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809186057] [2024-06-14 13:02:08,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809186057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:08,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:08,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:08,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294885796] [2024-06-14 13:02:08,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:08,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:08,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:08,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:08,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:09,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:02:09,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 181 transitions, 2524 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:09,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:09,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:02:09,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:11,225 INFO L124 PetriNetUnfolderBase]: 3314/6045 cut-off events. [2024-06-14 13:02:11,225 INFO L125 PetriNetUnfolderBase]: For 112286/112303 co-relation queries the response was YES. [2024-06-14 13:02:11,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33609 conditions, 6045 events. 3314/6045 cut-off events. For 112286/112303 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 46966 event pairs, 1128 based on Foata normal form. 58/6101 useless extension candidates. Maximal degree in co-relation 33533. Up to 4127 conditions per place. [2024-06-14 13:02:11,272 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 188 selfloop transitions, 60 changer transitions 0/254 dead transitions. [2024-06-14 13:02:11,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 254 transitions, 3622 flow [2024-06-14 13:02:11,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:02:11,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:02:11,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-14 13:02:11,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-14 13:02:11,274 INFO L175 Difference]: Start difference. First operand has 153 places, 181 transitions, 2524 flow. Second operand 11 states and 217 transitions. [2024-06-14 13:02:11,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 254 transitions, 3622 flow [2024-06-14 13:02:11,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 254 transitions, 3472 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-14 13:02:11,441 INFO L231 Difference]: Finished difference. Result has 158 places, 185 transitions, 2657 flow [2024-06-14 13:02:11,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2398, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2657, PETRI_PLACES=158, PETRI_TRANSITIONS=185} [2024-06-14 13:02:11,441 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-14 13:02:11,441 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 185 transitions, 2657 flow [2024-06-14 13:02:11,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:11,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:11,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:11,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:02:11,442 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)] === [2024-06-14 13:02:11,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:11,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1582611544, now seen corresponding path program 2 times [2024-06-14 13:02:11,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:11,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766415783] [2024-06-14 13:02:11,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:11,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:14,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:14,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766415783] [2024-06-14 13:02:14,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766415783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:14,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:14,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:14,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113032471] [2024-06-14 13:02:14,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:14,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:14,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:14,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:14,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:14,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:02:14,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 185 transitions, 2657 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:14,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:14,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:02:14,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:16,314 INFO L124 PetriNetUnfolderBase]: 3360/6167 cut-off events. [2024-06-14 13:02:16,314 INFO L125 PetriNetUnfolderBase]: For 113088/113105 co-relation queries the response was YES. [2024-06-14 13:02:16,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34372 conditions, 6167 events. 3360/6167 cut-off events. For 113088/113105 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 48429 event pairs, 1025 based on Foata normal form. 32/6185 useless extension candidates. Maximal degree in co-relation 34294. Up to 4464 conditions per place. [2024-06-14 13:02:16,361 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 177 selfloop transitions, 57 changer transitions 0/240 dead transitions. [2024-06-14 13:02:16,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 240 transitions, 3506 flow [2024-06-14 13:02:16,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:02:16,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:02:16,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-14 13:02:16,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-14 13:02:16,362 INFO L175 Difference]: Start difference. First operand has 158 places, 185 transitions, 2657 flow. Second operand 8 states and 163 transitions. [2024-06-14 13:02:16,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 240 transitions, 3506 flow [2024-06-14 13:02:16,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 240 transitions, 3358 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-14 13:02:16,521 INFO L231 Difference]: Finished difference. Result has 158 places, 187 transitions, 2673 flow [2024-06-14 13:02:16,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2673, PETRI_PLACES=158, PETRI_TRANSITIONS=187} [2024-06-14 13:02:16,521 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-14 13:02:16,522 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 187 transitions, 2673 flow [2024-06-14 13:02:16,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:16,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:16,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:16,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:02:16,522 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)] === [2024-06-14 13:02:16,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:16,522 INFO L85 PathProgramCache]: Analyzing trace with hash -794478222, now seen corresponding path program 7 times [2024-06-14 13:02:16,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:16,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24491859] [2024-06-14 13:02:16,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:16,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:19,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:19,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24491859] [2024-06-14 13:02:19,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24491859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:19,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:19,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:19,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528521870] [2024-06-14 13:02:19,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:19,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:19,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:19,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:19,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:19,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:02:19,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 187 transitions, 2673 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:19,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:19,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:02:19,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:21,596 INFO L124 PetriNetUnfolderBase]: 3569/6491 cut-off events. [2024-06-14 13:02:21,596 INFO L125 PetriNetUnfolderBase]: For 126249/126266 co-relation queries the response was YES. [2024-06-14 13:02:21,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36503 conditions, 6491 events. 3569/6491 cut-off events. For 126249/126266 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 51005 event pairs, 1176 based on Foata normal form. 46/6526 useless extension candidates. Maximal degree in co-relation 36424. Up to 4644 conditions per place. [2024-06-14 13:02:21,652 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 178 selfloop transitions, 97 changer transitions 0/281 dead transitions. [2024-06-14 13:02:21,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 281 transitions, 3954 flow [2024-06-14 13:02:21,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:02:21,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:02:21,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-14 13:02:21,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-14 13:02:21,654 INFO L175 Difference]: Start difference. First operand has 158 places, 187 transitions, 2673 flow. Second operand 12 states and 244 transitions. [2024-06-14 13:02:21,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 281 transitions, 3954 flow [2024-06-14 13:02:21,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 281 transitions, 3772 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 13:02:21,861 INFO L231 Difference]: Finished difference. Result has 167 places, 212 transitions, 3116 flow [2024-06-14 13:02:21,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2472, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3116, PETRI_PLACES=167, PETRI_TRANSITIONS=212} [2024-06-14 13:02:21,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-14 13:02:21,862 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 212 transitions, 3116 flow [2024-06-14 13:02:21,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:21,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:21,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:21,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:02:21,862 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:21,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:21,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1837815175, now seen corresponding path program 1 times [2024-06-14 13:02:21,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:21,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561945598] [2024-06-14 13:02:21,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:21,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:23,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:23,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561945598] [2024-06-14 13:02:23,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561945598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:23,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:23,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:02:23,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601233192] [2024-06-14 13:02:23,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:23,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:02:23,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:23,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:02:23,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:02:23,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:02:23,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 212 transitions, 3116 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:23,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:23,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:02:23,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:24,859 INFO L124 PetriNetUnfolderBase]: 3561/6517 cut-off events. [2024-06-14 13:02:24,859 INFO L125 PetriNetUnfolderBase]: For 127219/127236 co-relation queries the response was YES. [2024-06-14 13:02:24,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38090 conditions, 6517 events. 3561/6517 cut-off events. For 127219/127236 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 51751 event pairs, 1449 based on Foata normal form. 19/6519 useless extension candidates. Maximal degree in co-relation 38006. Up to 5761 conditions per place. [2024-06-14 13:02:24,916 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 202 selfloop transitions, 15 changer transitions 0/223 dead transitions. [2024-06-14 13:02:24,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 223 transitions, 3576 flow [2024-06-14 13:02:24,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:02:24,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:02:24,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-14 13:02:24,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:02:24,918 INFO L175 Difference]: Start difference. First operand has 167 places, 212 transitions, 3116 flow. Second operand 5 states and 90 transitions. [2024-06-14 13:02:24,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 223 transitions, 3576 flow [2024-06-14 13:02:25,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 223 transitions, 3363 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-14 13:02:25,174 INFO L231 Difference]: Finished difference. Result has 166 places, 212 transitions, 2945 flow [2024-06-14 13:02:25,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2903, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2945, PETRI_PLACES=166, PETRI_TRANSITIONS=212} [2024-06-14 13:02:25,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-14 13:02:25,175 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 212 transitions, 2945 flow [2024-06-14 13:02:25,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:25,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:25,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:25,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:02:25,175 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)] === [2024-06-14 13:02:25,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:25,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2096705371, now seen corresponding path program 2 times [2024-06-14 13:02:25,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:25,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186721476] [2024-06-14 13:02:25,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:25,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:26,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:26,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186721476] [2024-06-14 13:02:26,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186721476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:26,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:26,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:02:26,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394758774] [2024-06-14 13:02:26,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:26,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:02:26,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:26,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:02:26,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:02:26,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:02:26,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 212 transitions, 2945 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:26,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:26,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:02:26,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:28,343 INFO L124 PetriNetUnfolderBase]: 3553/6506 cut-off events. [2024-06-14 13:02:28,344 INFO L125 PetriNetUnfolderBase]: For 121329/121346 co-relation queries the response was YES. [2024-06-14 13:02:28,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36365 conditions, 6506 events. 3553/6506 cut-off events. For 121329/121346 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 51760 event pairs, 1439 based on Foata normal form. 19/6508 useless extension candidates. Maximal degree in co-relation 36280. Up to 5737 conditions per place. [2024-06-14 13:02:28,397 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 200 selfloop transitions, 19 changer transitions 0/225 dead transitions. [2024-06-14 13:02:28,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 225 transitions, 3413 flow [2024-06-14 13:02:28,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:02:28,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:02:28,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-14 13:02:28,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-14 13:02:28,399 INFO L175 Difference]: Start difference. First operand has 166 places, 212 transitions, 2945 flow. Second operand 6 states and 104 transitions. [2024-06-14 13:02:28,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 225 transitions, 3413 flow [2024-06-14 13:02:28,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 225 transitions, 3364 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:02:28,619 INFO L231 Difference]: Finished difference. Result has 167 places, 212 transitions, 2942 flow [2024-06-14 13:02:28,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2896, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2942, PETRI_PLACES=167, PETRI_TRANSITIONS=212} [2024-06-14 13:02:28,620 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-14 13:02:28,620 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 212 transitions, 2942 flow [2024-06-14 13:02:28,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:28,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:28,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:28,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:02:28,621 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:28,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:28,621 INFO L85 PathProgramCache]: Analyzing trace with hash -2091313789, now seen corresponding path program 1 times [2024-06-14 13:02:28,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:28,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170287194] [2024-06-14 13:02:28,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:28,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:30,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:30,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170287194] [2024-06-14 13:02:30,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170287194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:30,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:30,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:02:30,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637721378] [2024-06-14 13:02:30,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:30,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:02:30,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:30,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:02:30,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:02:30,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:02:30,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 212 transitions, 2942 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:30,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:30,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:02:30,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:32,357 INFO L124 PetriNetUnfolderBase]: 3545/6495 cut-off events. [2024-06-14 13:02:32,357 INFO L125 PetriNetUnfolderBase]: For 121439/121439 co-relation queries the response was YES. [2024-06-14 13:02:32,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36145 conditions, 6495 events. 3545/6495 cut-off events. For 121439/121439 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 51506 event pairs, 1470 based on Foata normal form. 12/6491 useless extension candidates. Maximal degree in co-relation 36060. Up to 5557 conditions per place. [2024-06-14 13:02:32,409 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 219 selfloop transitions, 24 changer transitions 0/249 dead transitions. [2024-06-14 13:02:32,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 249 transitions, 3737 flow [2024-06-14 13:02:32,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:02:32,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:02:32,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-14 13:02:32,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-14 13:02:32,410 INFO L175 Difference]: Start difference. First operand has 167 places, 212 transitions, 2942 flow. Second operand 6 states and 113 transitions. [2024-06-14 13:02:32,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 249 transitions, 3737 flow [2024-06-14 13:02:32,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 249 transitions, 3661 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 13:02:32,622 INFO L231 Difference]: Finished difference. Result has 168 places, 217 transitions, 3027 flow [2024-06-14 13:02:32,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2866, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3027, PETRI_PLACES=168, PETRI_TRANSITIONS=217} [2024-06-14 13:02:32,622 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-14 13:02:32,623 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 217 transitions, 3027 flow [2024-06-14 13:02:32,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:32,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:32,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:32,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:02:32,623 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:32,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:32,624 INFO L85 PathProgramCache]: Analyzing trace with hash -711936859, now seen corresponding path program 2 times [2024-06-14 13:02:32,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:32,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620962166] [2024-06-14 13:02:32,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:32,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:34,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:34,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620962166] [2024-06-14 13:02:34,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620962166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:34,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:34,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:02:34,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936110486] [2024-06-14 13:02:34,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:34,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:02:34,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:34,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:02:34,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:02:34,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:02:34,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 217 transitions, 3027 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:34,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:34,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:02:34,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:36,364 INFO L124 PetriNetUnfolderBase]: 3450/6299 cut-off events. [2024-06-14 13:02:36,365 INFO L125 PetriNetUnfolderBase]: For 124265/124265 co-relation queries the response was YES. [2024-06-14 13:02:36,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35538 conditions, 6299 events. 3450/6299 cut-off events. For 124265/124265 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 49413 event pairs, 1472 based on Foata normal form. 5/6284 useless extension candidates. Maximal degree in co-relation 35453. Up to 5418 conditions per place. [2024-06-14 13:02:36,415 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 207 selfloop transitions, 27 changer transitions 4/244 dead transitions. [2024-06-14 13:02:36,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 244 transitions, 3669 flow [2024-06-14 13:02:36,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:02:36,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:02:36,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-14 13:02:36,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-14 13:02:36,417 INFO L175 Difference]: Start difference. First operand has 168 places, 217 transitions, 3027 flow. Second operand 6 states and 109 transitions. [2024-06-14 13:02:36,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 244 transitions, 3669 flow [2024-06-14 13:02:36,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 244 transitions, 3641 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 13:02:36,637 INFO L231 Difference]: Finished difference. Result has 171 places, 213 transitions, 3035 flow [2024-06-14 13:02:36,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2999, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3035, PETRI_PLACES=171, PETRI_TRANSITIONS=213} [2024-06-14 13:02:36,637 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-14 13:02:36,637 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 213 transitions, 3035 flow [2024-06-14 13:02:36,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:36,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:36,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:36,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:02:36,638 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:36,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:36,638 INFO L85 PathProgramCache]: Analyzing trace with hash -583831268, now seen corresponding path program 1 times [2024-06-14 13:02:36,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:36,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410135611] [2024-06-14 13:02:36,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:36,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:38,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:38,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410135611] [2024-06-14 13:02:38,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410135611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:38,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:38,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:02:38,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055965830] [2024-06-14 13:02:38,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:38,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:02:38,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:38,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:02:38,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:02:38,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:02:38,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 213 transitions, 3035 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-14 13:02:38,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:38,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:02:38,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:40,036 INFO L124 PetriNetUnfolderBase]: 3415/6247 cut-off events. [2024-06-14 13:02:40,036 INFO L125 PetriNetUnfolderBase]: For 129922/129935 co-relation queries the response was YES. [2024-06-14 13:02:40,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35661 conditions, 6247 events. 3415/6247 cut-off events. For 129922/129935 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 49159 event pairs, 1495 based on Foata normal form. 15/6244 useless extension candidates. Maximal degree in co-relation 35575. Up to 5498 conditions per place. [2024-06-14 13:02:40,094 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 213 selfloop transitions, 21 changer transitions 0/240 dead transitions. [2024-06-14 13:02:40,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 240 transitions, 3667 flow [2024-06-14 13:02:40,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:02:40,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:02:40,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 13:02:40,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-14 13:02:40,095 INFO L175 Difference]: Start difference. First operand has 171 places, 213 transitions, 3035 flow. Second operand 7 states and 127 transitions. [2024-06-14 13:02:40,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 240 transitions, 3667 flow [2024-06-14 13:02:40,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 240 transitions, 3625 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 13:02:40,360 INFO L231 Difference]: Finished difference. Result has 175 places, 215 transitions, 3071 flow [2024-06-14 13:02:40,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2993, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3071, PETRI_PLACES=175, PETRI_TRANSITIONS=215} [2024-06-14 13:02:40,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-14 13:02:40,361 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 215 transitions, 3071 flow [2024-06-14 13:02:40,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-14 13:02:40,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:40,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:40,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:02:40,361 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:40,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:40,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1093385180, now seen corresponding path program 2 times [2024-06-14 13:02:40,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:40,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529674235] [2024-06-14 13:02:40,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:40,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:41,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:41,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529674235] [2024-06-14 13:02:41,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529674235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:41,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:41,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:02:41,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893440647] [2024-06-14 13:02:41,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:41,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:02:41,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:41,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:02:41,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:02:41,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:02:41,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 215 transitions, 3071 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-14 13:02:41,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:41,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:02:41,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:43,670 INFO L124 PetriNetUnfolderBase]: 3407/6234 cut-off events. [2024-06-14 13:02:43,671 INFO L125 PetriNetUnfolderBase]: For 135903/135916 co-relation queries the response was YES. [2024-06-14 13:02:43,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35726 conditions, 6234 events. 3407/6234 cut-off events. For 135903/135916 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 49043 event pairs, 1495 based on Foata normal form. 15/6231 useless extension candidates. Maximal degree in co-relation 35638. Up to 5520 conditions per place. [2024-06-14 13:02:43,718 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 206 selfloop transitions, 16 changer transitions 0/228 dead transitions. [2024-06-14 13:02:43,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 228 transitions, 3556 flow [2024-06-14 13:02:43,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:02:43,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:02:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 13:02:43,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-14 13:02:43,720 INFO L175 Difference]: Start difference. First operand has 175 places, 215 transitions, 3071 flow. Second operand 6 states and 103 transitions. [2024-06-14 13:02:43,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 228 transitions, 3556 flow [2024-06-14 13:02:43,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 228 transitions, 3492 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 13:02:43,924 INFO L231 Difference]: Finished difference. Result has 176 places, 215 transitions, 3046 flow [2024-06-14 13:02:43,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3007, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3046, PETRI_PLACES=176, PETRI_TRANSITIONS=215} [2024-06-14 13:02:43,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-14 13:02:43,925 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 215 transitions, 3046 flow [2024-06-14 13:02:43,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-14 13:02:43,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:43,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:43,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:02:43,926 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:43,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:43,926 INFO L85 PathProgramCache]: Analyzing trace with hash -229269698, now seen corresponding path program 3 times [2024-06-14 13:02:43,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:43,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645558079] [2024-06-14 13:02:43,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:43,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:45,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:45,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645558079] [2024-06-14 13:02:45,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645558079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:45,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:45,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:02:45,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182669057] [2024-06-14 13:02:45,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:45,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:02:45,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:45,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:02:45,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:02:45,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:02:45,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 215 transitions, 3046 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-14 13:02:45,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:45,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:02:45,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:47,231 INFO L124 PetriNetUnfolderBase]: 3399/6229 cut-off events. [2024-06-14 13:02:47,232 INFO L125 PetriNetUnfolderBase]: For 141303/141312 co-relation queries the response was YES. [2024-06-14 13:02:47,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35762 conditions, 6229 events. 3399/6229 cut-off events. For 141303/141312 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 49102 event pairs, 1489 based on Foata normal form. 11/6222 useless extension candidates. Maximal degree in co-relation 35673. Up to 5506 conditions per place. [2024-06-14 13:02:47,285 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 208 selfloop transitions, 19 changer transitions 0/233 dead transitions. [2024-06-14 13:02:47,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 233 transitions, 3613 flow [2024-06-14 13:02:47,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:02:47,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:02:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 13:02:47,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-14 13:02:47,286 INFO L175 Difference]: Start difference. First operand has 176 places, 215 transitions, 3046 flow. Second operand 7 states and 116 transitions. [2024-06-14 13:02:47,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 233 transitions, 3613 flow [2024-06-14 13:02:47,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 233 transitions, 3565 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:02:47,556 INFO L231 Difference]: Finished difference. Result has 178 places, 219 transitions, 3121 flow [2024-06-14 13:02:47,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2998, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3121, PETRI_PLACES=178, PETRI_TRANSITIONS=219} [2024-06-14 13:02:47,556 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-14 13:02:47,556 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 219 transitions, 3121 flow [2024-06-14 13:02:47,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-14 13:02:47,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:47,556 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] [2024-06-14 13:02:47,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:02:47,557 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:47,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:47,557 INFO L85 PathProgramCache]: Analyzing trace with hash -474319644, now seen corresponding path program 1 times [2024-06-14 13:02:47,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:47,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347328521] [2024-06-14 13:02:47,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:47,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:47,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:49,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:49,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347328521] [2024-06-14 13:02:49,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347328521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:49,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:49,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:02:49,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41105894] [2024-06-14 13:02:49,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:49,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:02:49,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:49,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:02:49,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:02:50,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:02:50,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 219 transitions, 3121 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:50,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:50,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:02:50,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:52,014 INFO L124 PetriNetUnfolderBase]: 3419/6264 cut-off events. [2024-06-14 13:02:52,015 INFO L125 PetriNetUnfolderBase]: For 150523/150532 co-relation queries the response was YES. [2024-06-14 13:02:52,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36261 conditions, 6264 events. 3419/6264 cut-off events. For 150523/150532 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 49311 event pairs, 1394 based on Foata normal form. 14/6260 useless extension candidates. Maximal degree in co-relation 36171. Up to 5406 conditions per place. [2024-06-14 13:02:52,066 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 225 selfloop transitions, 24 changer transitions 0/255 dead transitions. [2024-06-14 13:02:52,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 255 transitions, 3814 flow [2024-06-14 13:02:52,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:02:52,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:02:52,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:02:52,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-14 13:02:52,068 INFO L175 Difference]: Start difference. First operand has 178 places, 219 transitions, 3121 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:02:52,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 255 transitions, 3814 flow [2024-06-14 13:02:52,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 255 transitions, 3720 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 13:02:52,333 INFO L231 Difference]: Finished difference. Result has 181 places, 220 transitions, 3093 flow [2024-06-14 13:02:52,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3027, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3093, PETRI_PLACES=181, PETRI_TRANSITIONS=220} [2024-06-14 13:02:52,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-14 13:02:52,333 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 220 transitions, 3093 flow [2024-06-14 13:02:52,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:52,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:52,334 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] [2024-06-14 13:02:52,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:02:52,334 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:52,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:52,334 INFO L85 PathProgramCache]: Analyzing trace with hash -474050874, now seen corresponding path program 2 times [2024-06-14 13:02:52,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:52,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792558803] [2024-06-14 13:02:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:52,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:54,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:54,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792558803] [2024-06-14 13:02:54,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792558803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:54,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:54,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:02:54,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251929116] [2024-06-14 13:02:54,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:54,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:02:54,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:54,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:02:54,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:02:54,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:02:54,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 220 transitions, 3093 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:54,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:54,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:02:54,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:56,530 INFO L124 PetriNetUnfolderBase]: 3439/6304 cut-off events. [2024-06-14 13:02:56,530 INFO L125 PetriNetUnfolderBase]: For 158792/158801 co-relation queries the response was YES. [2024-06-14 13:02:56,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36698 conditions, 6304 events. 3439/6304 cut-off events. For 158792/158801 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 49834 event pairs, 1493 based on Foata normal form. 14/6300 useless extension candidates. Maximal degree in co-relation 36608. Up to 5519 conditions per place. [2024-06-14 13:02:56,595 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 221 selfloop transitions, 22 changer transitions 0/249 dead transitions. [2024-06-14 13:02:56,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 249 transitions, 3690 flow [2024-06-14 13:02:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:02:56,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:02:56,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:02:56,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 13:02:56,597 INFO L175 Difference]: Start difference. First operand has 181 places, 220 transitions, 3093 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:02:56,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 249 transitions, 3690 flow [2024-06-14 13:02:56,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 249 transitions, 3624 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:02:56,871 INFO L231 Difference]: Finished difference. Result has 183 places, 221 transitions, 3093 flow [2024-06-14 13:02:56,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3029, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3093, PETRI_PLACES=183, PETRI_TRANSITIONS=221} [2024-06-14 13:02:56,871 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-14 13:02:56,871 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 221 transitions, 3093 flow [2024-06-14 13:02:56,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:56,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:56,872 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] [2024-06-14 13:02:56,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:02:56,872 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:56,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:56,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1613377590, now seen corresponding path program 1 times [2024-06-14 13:02:56,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:56,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931609549] [2024-06-14 13:02:56,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:56,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:58,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:58,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931609549] [2024-06-14 13:02:58,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931609549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:58,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:58,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:02:58,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707694641] [2024-06-14 13:02:58,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:58,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:02:58,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:58,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:02:58,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:02:59,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:02:59,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 221 transitions, 3093 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-14 13:02:59,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:59,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:02:59,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:01,200 INFO L124 PetriNetUnfolderBase]: 3431/6290 cut-off events. [2024-06-14 13:03:01,200 INFO L125 PetriNetUnfolderBase]: For 166675/166684 co-relation queries the response was YES. [2024-06-14 13:03:01,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36469 conditions, 6290 events. 3431/6290 cut-off events. For 166675/166684 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 49477 event pairs, 1163 based on Foata normal form. 20/6292 useless extension candidates. Maximal degree in co-relation 36378. Up to 5165 conditions per place. [2024-06-14 13:03:01,258 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 204 selfloop transitions, 48 changer transitions 0/258 dead transitions. [2024-06-14 13:03:01,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 258 transitions, 3882 flow [2024-06-14 13:03:01,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:03:01,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:03:01,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:03:01,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 13:03:01,260 INFO L175 Difference]: Start difference. First operand has 183 places, 221 transitions, 3093 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:03:01,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 258 transitions, 3882 flow [2024-06-14 13:03:01,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 258 transitions, 3834 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:03:01,562 INFO L231 Difference]: Finished difference. Result has 185 places, 225 transitions, 3256 flow [2024-06-14 13:03:01,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3045, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3256, PETRI_PLACES=185, PETRI_TRANSITIONS=225} [2024-06-14 13:03:01,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-14 13:03:01,563 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 225 transitions, 3256 flow [2024-06-14 13:03:01,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-14 13:03:01,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:01,563 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] [2024-06-14 13:03:01,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:03:01,563 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:01,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:01,563 INFO L85 PathProgramCache]: Analyzing trace with hash -464792476, now seen corresponding path program 2 times [2024-06-14 13:03:01,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:01,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222815442] [2024-06-14 13:03:01,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:01,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:03,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:03,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222815442] [2024-06-14 13:03:03,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222815442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:03,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:03,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:03:03,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790845851] [2024-06-14 13:03:03,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:03,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:03:03,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:03,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:03:03,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:03:03,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:03:03,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 225 transitions, 3256 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-14 13:03:03,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:03,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:03:03,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:05,538 INFO L124 PetriNetUnfolderBase]: 3335/6088 cut-off events. [2024-06-14 13:03:05,538 INFO L125 PetriNetUnfolderBase]: For 167891/167916 co-relation queries the response was YES. [2024-06-14 13:03:05,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35709 conditions, 6088 events. 3335/6088 cut-off events. For 167891/167916 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 47447 event pairs, 1113 based on Foata normal form. 23/6092 useless extension candidates. Maximal degree in co-relation 35617. Up to 5016 conditions per place. [2024-06-14 13:03:05,590 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 193 selfloop transitions, 52 changer transitions 1/252 dead transitions. [2024-06-14 13:03:05,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 252 transitions, 3862 flow [2024-06-14 13:03:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:03:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:03:05,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 13:03:05,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-14 13:03:05,592 INFO L175 Difference]: Start difference. First operand has 185 places, 225 transitions, 3256 flow. Second operand 7 states and 129 transitions. [2024-06-14 13:03:05,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 252 transitions, 3862 flow [2024-06-14 13:03:05,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 252 transitions, 3766 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 13:03:05,856 INFO L231 Difference]: Finished difference. Result has 186 places, 224 transitions, 3265 flow [2024-06-14 13:03:05,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3160, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3265, PETRI_PLACES=186, PETRI_TRANSITIONS=224} [2024-06-14 13:03:05,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-14 13:03:05,857 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 224 transitions, 3265 flow [2024-06-14 13:03:05,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-14 13:03:05,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:05,857 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] [2024-06-14 13:03:05,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:03:05,858 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:05,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:05,858 INFO L85 PathProgramCache]: Analyzing trace with hash -464784943, now seen corresponding path program 1 times [2024-06-14 13:03:05,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:05,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240739084] [2024-06-14 13:03:05,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:05,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:07,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:07,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:07,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240739084] [2024-06-14 13:03:07,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240739084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:07,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:07,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:07,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798495414] [2024-06-14 13:03:07,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:07,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:07,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:07,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:07,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:07,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:03:07,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 224 transitions, 3265 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:07,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:07,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:03:07,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:09,566 INFO L124 PetriNetUnfolderBase]: 3335/6090 cut-off events. [2024-06-14 13:03:09,566 INFO L125 PetriNetUnfolderBase]: For 166441/166450 co-relation queries the response was YES. [2024-06-14 13:03:09,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35709 conditions, 6090 events. 3335/6090 cut-off events. For 166441/166450 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 47544 event pairs, 1320 based on Foata normal form. 10/6084 useless extension candidates. Maximal degree in co-relation 35617. Up to 5365 conditions per place. [2024-06-14 13:03:09,621 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 213 selfloop transitions, 21 changer transitions 0/240 dead transitions. [2024-06-14 13:03:09,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 240 transitions, 3814 flow [2024-06-14 13:03:09,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:03:09,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:03:09,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-14 13:03:09,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-14 13:03:09,622 INFO L175 Difference]: Start difference. First operand has 186 places, 224 transitions, 3265 flow. Second operand 6 states and 104 transitions. [2024-06-14 13:03:09,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 240 transitions, 3814 flow [2024-06-14 13:03:09,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 240 transitions, 3676 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 13:03:09,850 INFO L231 Difference]: Finished difference. Result has 185 places, 226 transitions, 3221 flow [2024-06-14 13:03:09,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3127, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3221, PETRI_PLACES=185, PETRI_TRANSITIONS=226} [2024-06-14 13:03:09,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-14 13:03:09,851 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 226 transitions, 3221 flow [2024-06-14 13:03:09,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:09,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:09,851 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] [2024-06-14 13:03:09,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:03:09,852 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:09,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:09,852 INFO L85 PathProgramCache]: Analyzing trace with hash -464796444, now seen corresponding path program 3 times [2024-06-14 13:03:09,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:09,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202198574] [2024-06-14 13:03:09,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:09,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:11,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:11,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202198574] [2024-06-14 13:03:11,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202198574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:11,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:11,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:11,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108628062] [2024-06-14 13:03:11,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:11,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:11,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:11,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:11,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:11,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:03:11,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 226 transitions, 3221 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:11,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:11,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:03:11,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:13,579 INFO L124 PetriNetUnfolderBase]: 3334/6095 cut-off events. [2024-06-14 13:03:13,579 INFO L125 PetriNetUnfolderBase]: For 166897/166906 co-relation queries the response was YES. [2024-06-14 13:03:13,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35353 conditions, 6095 events. 3334/6095 cut-off events. For 166897/166906 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 47653 event pairs, 1315 based on Foata normal form. 18/6096 useless extension candidates. Maximal degree in co-relation 35261. Up to 5324 conditions per place. [2024-06-14 13:03:13,634 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 216 selfloop transitions, 23 changer transitions 0/245 dead transitions. [2024-06-14 13:03:13,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 245 transitions, 3778 flow [2024-06-14 13:03:13,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:03:13,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:03:13,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 13:03:13,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-14 13:03:13,635 INFO L175 Difference]: Start difference. First operand has 185 places, 226 transitions, 3221 flow. Second operand 7 states and 118 transitions. [2024-06-14 13:03:13,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 245 transitions, 3778 flow [2024-06-14 13:03:13,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 245 transitions, 3709 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:03:13,875 INFO L231 Difference]: Finished difference. Result has 187 places, 227 transitions, 3225 flow [2024-06-14 13:03:13,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3152, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3225, PETRI_PLACES=187, PETRI_TRANSITIONS=227} [2024-06-14 13:03:13,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-14 13:03:13,876 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 227 transitions, 3225 flow [2024-06-14 13:03:13,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:13,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:13,877 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] [2024-06-14 13:03:13,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:03:13,877 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:13,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:13,877 INFO L85 PathProgramCache]: Analyzing trace with hash 292183362, now seen corresponding path program 3 times [2024-06-14 13:03:13,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:13,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273543185] [2024-06-14 13:03:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:13,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:16,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:16,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273543185] [2024-06-14 13:03:16,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273543185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:16,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:16,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:03:16,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291704756] [2024-06-14 13:03:16,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:16,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:03:16,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:16,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:03:16,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:03:16,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:03:16,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 227 transitions, 3225 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-14 13:03:16,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:16,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:03:16,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:18,488 INFO L124 PetriNetUnfolderBase]: 3380/6165 cut-off events. [2024-06-14 13:03:18,488 INFO L125 PetriNetUnfolderBase]: For 169867/169876 co-relation queries the response was YES. [2024-06-14 13:03:18,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35731 conditions, 6165 events. 3380/6165 cut-off events. For 169867/169876 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 48119 event pairs, 1089 based on Foata normal form. 20/6170 useless extension candidates. Maximal degree in co-relation 35639. Up to 4715 conditions per place. [2024-06-14 13:03:18,542 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 213 selfloop transitions, 54 changer transitions 0/273 dead transitions. [2024-06-14 13:03:18,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 273 transitions, 4199 flow [2024-06-14 13:03:18,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:03:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:03:18,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 13:03:18,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-14 13:03:18,544 INFO L175 Difference]: Start difference. First operand has 187 places, 227 transitions, 3225 flow. Second operand 7 states and 132 transitions. [2024-06-14 13:03:18,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 273 transitions, 4199 flow [2024-06-14 13:03:18,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 273 transitions, 4142 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 13:03:18,804 INFO L231 Difference]: Finished difference. Result has 189 places, 233 transitions, 3389 flow [2024-06-14 13:03:18,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3168, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3389, PETRI_PLACES=189, PETRI_TRANSITIONS=233} [2024-06-14 13:03:18,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-14 13:03:18,805 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 233 transitions, 3389 flow [2024-06-14 13:03:18,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-14 13:03:18,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:18,806 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] [2024-06-14 13:03:18,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:03:18,806 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:18,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:18,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1277195292, now seen corresponding path program 4 times [2024-06-14 13:03:18,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:18,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360445477] [2024-06-14 13:03:18,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:18,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:21,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:21,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:21,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360445477] [2024-06-14 13:03:21,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360445477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:21,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:21,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:03:21,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911375825] [2024-06-14 13:03:21,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:21,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:03:21,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:21,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:03:21,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:03:21,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:03:21,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 233 transitions, 3389 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-14 13:03:21,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:21,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:03:21,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:23,015 INFO L124 PetriNetUnfolderBase]: 3401/6191 cut-off events. [2024-06-14 13:03:23,015 INFO L125 PetriNetUnfolderBase]: For 176580/176599 co-relation queries the response was YES. [2024-06-14 13:03:23,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36426 conditions, 6191 events. 3401/6191 cut-off events. For 176580/176599 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 48310 event pairs, 1106 based on Foata normal form. 16/6185 useless extension candidates. Maximal degree in co-relation 36333. Up to 4725 conditions per place. [2024-06-14 13:03:23,066 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 199 selfloop transitions, 69 changer transitions 0/274 dead transitions. [2024-06-14 13:03:23,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 274 transitions, 4408 flow [2024-06-14 13:03:23,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:03:23,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:03:23,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 13:03:23,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-14 13:03:23,067 INFO L175 Difference]: Start difference. First operand has 189 places, 233 transitions, 3389 flow. Second operand 7 states and 130 transitions. [2024-06-14 13:03:23,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 274 transitions, 4408 flow [2024-06-14 13:03:23,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 274 transitions, 4334 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 13:03:23,324 INFO L231 Difference]: Finished difference. Result has 193 places, 238 transitions, 3555 flow [2024-06-14 13:03:23,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3317, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3555, PETRI_PLACES=193, PETRI_TRANSITIONS=238} [2024-06-14 13:03:23,325 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-14 13:03:23,325 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 238 transitions, 3555 flow [2024-06-14 13:03:23,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-14 13:03:23,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:23,325 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] [2024-06-14 13:03:23,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:03:23,326 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:23,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:23,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1488293186, now seen corresponding path program 5 times [2024-06-14 13:03:23,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:23,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708552838] [2024-06-14 13:03:23,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:23,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:25,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:25,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708552838] [2024-06-14 13:03:25,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708552838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:25,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:25,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:03:25,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789840454] [2024-06-14 13:03:25,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:25,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:03:25,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:25,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:03:25,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:03:25,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:03:25,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 238 transitions, 3555 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-14 13:03:25,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:25,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:03:25,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:27,397 INFO L124 PetriNetUnfolderBase]: 3388/6177 cut-off events. [2024-06-14 13:03:27,397 INFO L125 PetriNetUnfolderBase]: For 184196/184215 co-relation queries the response was YES. [2024-06-14 13:03:27,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36429 conditions, 6177 events. 3388/6177 cut-off events. For 184196/184215 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 48227 event pairs, 1112 based on Foata normal form. 16/6171 useless extension candidates. Maximal degree in co-relation 36335. Up to 4720 conditions per place. [2024-06-14 13:03:27,456 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 196 selfloop transitions, 68 changer transitions 0/270 dead transitions. [2024-06-14 13:03:27,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 270 transitions, 4389 flow [2024-06-14 13:03:27,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:03:27,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:03:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 13:03:27,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-14 13:03:27,458 INFO L175 Difference]: Start difference. First operand has 193 places, 238 transitions, 3555 flow. Second operand 7 states and 127 transitions. [2024-06-14 13:03:27,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 270 transitions, 4389 flow [2024-06-14 13:03:27,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 270 transitions, 4090 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 13:03:27,729 INFO L231 Difference]: Finished difference. Result has 194 places, 238 transitions, 3402 flow [2024-06-14 13:03:27,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3256, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3402, PETRI_PLACES=194, PETRI_TRANSITIONS=238} [2024-06-14 13:03:27,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-14 13:03:27,730 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 238 transitions, 3402 flow [2024-06-14 13:03:27,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-14 13:03:27,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:27,730 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] [2024-06-14 13:03:27,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:03:27,730 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)] === [2024-06-14 13:03:27,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:27,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1482575298, now seen corresponding path program 4 times [2024-06-14 13:03:27,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:27,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038187680] [2024-06-14 13:03:27,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:27,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:30,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:30,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:30,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038187680] [2024-06-14 13:03:30,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038187680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:30,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:30,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:30,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410595611] [2024-06-14 13:03:30,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:30,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:30,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:30,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:30,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:30,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:03:30,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 238 transitions, 3402 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:30,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:30,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:03:30,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:31,985 INFO L124 PetriNetUnfolderBase]: 3395/6189 cut-off events. [2024-06-14 13:03:31,986 INFO L125 PetriNetUnfolderBase]: For 187404/187413 co-relation queries the response was YES. [2024-06-14 13:03:32,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36019 conditions, 6189 events. 3395/6189 cut-off events. For 187404/187413 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 48412 event pairs, 1402 based on Foata normal form. 14/6186 useless extension candidates. Maximal degree in co-relation 35926. Up to 5453 conditions per place. [2024-06-14 13:03:32,049 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 231 selfloop transitions, 18 changer transitions 0/255 dead transitions. [2024-06-14 13:03:32,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 255 transitions, 3976 flow [2024-06-14 13:03:32,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:03:32,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:03:32,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 13:03:32,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-14 13:03:32,050 INFO L175 Difference]: Start difference. First operand has 194 places, 238 transitions, 3402 flow. Second operand 7 states and 117 transitions. [2024-06-14 13:03:32,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 255 transitions, 3976 flow [2024-06-14 13:03:32,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 255 transitions, 3735 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:03:32,327 INFO L231 Difference]: Finished difference. Result has 193 places, 239 transitions, 3225 flow [2024-06-14 13:03:32,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3161, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3225, PETRI_PLACES=193, PETRI_TRANSITIONS=239} [2024-06-14 13:03:32,328 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-14 13:03:32,328 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 239 transitions, 3225 flow [2024-06-14 13:03:32,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:32,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:32,328 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] [2024-06-14 13:03:32,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:03:32,328 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)] === [2024-06-14 13:03:32,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:32,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1495473809, now seen corresponding path program 2 times [2024-06-14 13:03:32,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:32,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135903005] [2024-06-14 13:03:32,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:32,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:34,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:34,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135903005] [2024-06-14 13:03:34,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135903005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:34,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:34,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:34,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531685464] [2024-06-14 13:03:34,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:34,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:34,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:34,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:34,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:34,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:03:34,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 239 transitions, 3225 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:34,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:34,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:03:34,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:36,234 INFO L124 PetriNetUnfolderBase]: 3390/6178 cut-off events. [2024-06-14 13:03:36,234 INFO L125 PetriNetUnfolderBase]: For 188616/188625 co-relation queries the response was YES. [2024-06-14 13:03:36,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35718 conditions, 6178 events. 3390/6178 cut-off events. For 188616/188625 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 48222 event pairs, 1299 based on Foata normal form. 10/6172 useless extension candidates. Maximal degree in co-relation 35624. Up to 5442 conditions per place. [2024-06-14 13:03:36,284 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 225 selfloop transitions, 25 changer transitions 0/256 dead transitions. [2024-06-14 13:03:36,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 256 transitions, 3795 flow [2024-06-14 13:03:36,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:03:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:03:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 13:03:36,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-14 13:03:36,286 INFO L175 Difference]: Start difference. First operand has 193 places, 239 transitions, 3225 flow. Second operand 7 states and 118 transitions. [2024-06-14 13:03:36,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 256 transitions, 3795 flow [2024-06-14 13:03:36,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 256 transitions, 3725 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:03:36,549 INFO L231 Difference]: Finished difference. Result has 194 places, 240 transitions, 3241 flow [2024-06-14 13:03:36,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3155, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3241, PETRI_PLACES=194, PETRI_TRANSITIONS=240} [2024-06-14 13:03:36,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-14 13:03:36,550 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 240 transitions, 3241 flow [2024-06-14 13:03:36,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:36,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:36,550 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] [2024-06-14 13:03:36,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:03:36,550 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)] === [2024-06-14 13:03:36,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:36,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1816384775, now seen corresponding path program 1 times [2024-06-14 13:03:36,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:36,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535908892] [2024-06-14 13:03:36,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:36,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:39,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:39,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535908892] [2024-06-14 13:03:39,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535908892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:39,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:39,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:39,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39653445] [2024-06-14 13:03:39,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:39,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:39,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:39,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:39,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:39,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:03:39,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 240 transitions, 3241 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:39,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:39,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:03:39,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:41,413 INFO L124 PetriNetUnfolderBase]: 3382/6152 cut-off events. [2024-06-14 13:03:41,413 INFO L125 PetriNetUnfolderBase]: For 196680/196687 co-relation queries the response was YES. [2024-06-14 13:03:41,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35506 conditions, 6152 events. 3382/6152 cut-off events. For 196680/196687 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 47764 event pairs, 1267 based on Foata normal form. 18/6158 useless extension candidates. Maximal degree in co-relation 35411. Up to 5260 conditions per place. [2024-06-14 13:03:41,465 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 246 selfloop transitions, 26 changer transitions 1/279 dead transitions. [2024-06-14 13:03:41,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 279 transitions, 4034 flow [2024-06-14 13:03:41,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:03:41,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:03:41,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:03:41,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-14 13:03:41,467 INFO L175 Difference]: Start difference. First operand has 194 places, 240 transitions, 3241 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:03:41,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 279 transitions, 4034 flow [2024-06-14 13:03:41,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 279 transitions, 3964 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 13:03:41,729 INFO L231 Difference]: Finished difference. Result has 197 places, 241 transitions, 3243 flow [2024-06-14 13:03:41,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3171, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3243, PETRI_PLACES=197, PETRI_TRANSITIONS=241} [2024-06-14 13:03:41,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-14 13:03:41,729 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 241 transitions, 3243 flow [2024-06-14 13:03:41,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:41,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:41,730 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] [2024-06-14 13:03:41,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:03:41,730 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)] === [2024-06-14 13:03:41,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:41,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1533614555, now seen corresponding path program 2 times [2024-06-14 13:03:41,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:41,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502623204] [2024-06-14 13:03:41,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:41,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:44,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:44,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502623204] [2024-06-14 13:03:44,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502623204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:44,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:44,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:44,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124923852] [2024-06-14 13:03:44,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:44,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:44,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:44,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:44,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:44,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:03:44,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 241 transitions, 3243 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:44,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:44,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:03:44,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:46,331 INFO L124 PetriNetUnfolderBase]: 3389/6160 cut-off events. [2024-06-14 13:03:46,331 INFO L125 PetriNetUnfolderBase]: For 199245/199252 co-relation queries the response was YES. [2024-06-14 13:03:46,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35878 conditions, 6160 events. 3389/6160 cut-off events. For 199245/199252 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 47845 event pairs, 1370 based on Foata normal form. 9/6153 useless extension candidates. Maximal degree in co-relation 35782. Up to 5436 conditions per place. [2024-06-14 13:03:46,391 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 22 changer transitions 1/270 dead transitions. [2024-06-14 13:03:46,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 270 transitions, 3894 flow [2024-06-14 13:03:46,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:03:46,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:03:46,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:03:46,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 13:03:46,392 INFO L175 Difference]: Start difference. First operand has 197 places, 241 transitions, 3243 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:03:46,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 270 transitions, 3894 flow [2024-06-14 13:03:46,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 270 transitions, 3849 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 13:03:46,698 INFO L231 Difference]: Finished difference. Result has 200 places, 242 transitions, 3265 flow [2024-06-14 13:03:46,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3199, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3265, PETRI_PLACES=200, PETRI_TRANSITIONS=242} [2024-06-14 13:03:46,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-14 13:03:46,699 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 242 transitions, 3265 flow [2024-06-14 13:03:46,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:46,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:46,699 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] [2024-06-14 13:03:46,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:03:46,700 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)] === [2024-06-14 13:03:46,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:46,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1701093605, now seen corresponding path program 3 times [2024-06-14 13:03:46,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:46,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520784718] [2024-06-14 13:03:46,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:46,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:49,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:49,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520784718] [2024-06-14 13:03:49,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520784718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:49,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:49,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:49,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728043742] [2024-06-14 13:03:49,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:49,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:49,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:49,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:49,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:49,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:03:49,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 242 transitions, 3265 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:49,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:49,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:03:49,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:51,320 INFO L124 PetriNetUnfolderBase]: 3405/6198 cut-off events. [2024-06-14 13:03:51,320 INFO L125 PetriNetUnfolderBase]: For 214403/214410 co-relation queries the response was YES. [2024-06-14 13:03:51,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36025 conditions, 6198 events. 3405/6198 cut-off events. For 214403/214410 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 48259 event pairs, 1381 based on Foata normal form. 21/6213 useless extension candidates. Maximal degree in co-relation 35928. Up to 5128 conditions per place. [2024-06-14 13:03:51,378 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 234 selfloop transitions, 45 changer transitions 3/288 dead transitions. [2024-06-14 13:03:51,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 288 transitions, 4158 flow [2024-06-14 13:03:51,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:03:51,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:03:51,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:03:51,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-14 13:03:51,380 INFO L175 Difference]: Start difference. First operand has 200 places, 242 transitions, 3265 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:03:51,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 288 transitions, 4158 flow [2024-06-14 13:03:51,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 288 transitions, 4100 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 13:03:51,710 INFO L231 Difference]: Finished difference. Result has 203 places, 242 transitions, 3314 flow [2024-06-14 13:03:51,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3207, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3314, PETRI_PLACES=203, PETRI_TRANSITIONS=242} [2024-06-14 13:03:51,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-14 13:03:51,711 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 242 transitions, 3314 flow [2024-06-14 13:03:51,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:51,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:51,711 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] [2024-06-14 13:03:51,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:03:51,712 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)] === [2024-06-14 13:03:51,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:51,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1700795075, now seen corresponding path program 4 times [2024-06-14 13:03:51,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:51,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449422464] [2024-06-14 13:03:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:51,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:53,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:53,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:53,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449422464] [2024-06-14 13:03:53,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449422464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:53,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:53,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:53,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42733758] [2024-06-14 13:03:53,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:53,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:53,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:53,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:53,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:54,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:03:54,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 242 transitions, 3314 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:54,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:54,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:03:54,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:56,337 INFO L124 PetriNetUnfolderBase]: 3393/6212 cut-off events. [2024-06-14 13:03:56,337 INFO L125 PetriNetUnfolderBase]: For 221164/221171 co-relation queries the response was YES. [2024-06-14 13:03:56,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35788 conditions, 6212 events. 3393/6212 cut-off events. For 221164/221171 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 48732 event pairs, 1140 based on Foata normal form. 32/6228 useless extension candidates. Maximal degree in co-relation 35690. Up to 5024 conditions per place. [2024-06-14 13:03:56,394 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 225 selfloop transitions, 54 changer transitions 2/287 dead transitions. [2024-06-14 13:03:56,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 287 transitions, 4209 flow [2024-06-14 13:03:56,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:03:56,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:03:56,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:03:56,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:03:56,396 INFO L175 Difference]: Start difference. First operand has 203 places, 242 transitions, 3314 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:03:56,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 287 transitions, 4209 flow [2024-06-14 13:03:56,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 287 transitions, 4124 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:03:56,686 INFO L231 Difference]: Finished difference. Result has 206 places, 247 transitions, 3483 flow [2024-06-14 13:03:56,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3233, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3483, PETRI_PLACES=206, PETRI_TRANSITIONS=247} [2024-06-14 13:03:56,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-14 13:03:56,687 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 247 transitions, 3483 flow [2024-06-14 13:03:56,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:56,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:56,687 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] [2024-06-14 13:03:56,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:03:56,687 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)] === [2024-06-14 13:03:56,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:56,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1523783525, now seen corresponding path program 5 times [2024-06-14 13:03:56,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:56,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828725550] [2024-06-14 13:03:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:56,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:59,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:59,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828725550] [2024-06-14 13:03:59,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828725550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:59,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:59,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:59,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465112616] [2024-06-14 13:03:59,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:59,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:59,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:59,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:59,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:59,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:03:59,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 247 transitions, 3483 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:59,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:59,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:03:59,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:01,718 INFO L124 PetriNetUnfolderBase]: 3352/6121 cut-off events. [2024-06-14 13:04:01,719 INFO L125 PetriNetUnfolderBase]: For 206634/206641 co-relation queries the response was YES. [2024-06-14 13:04:01,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35533 conditions, 6121 events. 3352/6121 cut-off events. For 206634/206641 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 47753 event pairs, 1350 based on Foata normal form. 9/6112 useless extension candidates. Maximal degree in co-relation 35434. Up to 5413 conditions per place. [2024-06-14 13:04:01,765 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 239 selfloop transitions, 17 changer transitions 1/263 dead transitions. [2024-06-14 13:04:01,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 263 transitions, 4053 flow [2024-06-14 13:04:01,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:04:01,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:04:01,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 13:04:01,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-14 13:04:01,767 INFO L175 Difference]: Start difference. First operand has 206 places, 247 transitions, 3483 flow. Second operand 7 states and 117 transitions. [2024-06-14 13:04:01,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 263 transitions, 4053 flow [2024-06-14 13:04:02,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 263 transitions, 3906 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 13:04:02,056 INFO L231 Difference]: Finished difference. Result has 206 places, 246 transitions, 3359 flow [2024-06-14 13:04:02,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3336, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3359, PETRI_PLACES=206, PETRI_TRANSITIONS=246} [2024-06-14 13:04:02,057 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-14 13:04:02,057 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 246 transitions, 3359 flow [2024-06-14 13:04:02,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:02,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:02,057 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] [2024-06-14 13:04:02,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:04:02,058 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)] === [2024-06-14 13:04:02,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:02,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1523663555, now seen corresponding path program 6 times [2024-06-14 13:04:02,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:02,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991054180] [2024-06-14 13:04:02,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:02,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:04,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:04,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:04,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991054180] [2024-06-14 13:04:04,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991054180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:04,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:04,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:04,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821001543] [2024-06-14 13:04:04,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:04,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:04,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:04,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:04,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:04,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:04:04,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 246 transitions, 3359 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:04,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:04,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:04:04,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:06,732 INFO L124 PetriNetUnfolderBase]: 3233/5885 cut-off events. [2024-06-14 13:04:06,732 INFO L125 PetriNetUnfolderBase]: For 211181/211204 co-relation queries the response was YES. [2024-06-14 13:04:06,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34110 conditions, 5885 events. 3233/5885 cut-off events. For 211181/211204 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 45421 event pairs, 923 based on Foata normal form. 23/5890 useless extension candidates. Maximal degree in co-relation 34010. Up to 4835 conditions per place. [2024-06-14 13:04:06,792 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 210 selfloop transitions, 58 changer transitions 4/278 dead transitions. [2024-06-14 13:04:06,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 278 transitions, 4075 flow [2024-06-14 13:04:06,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:06,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:06,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:04:06,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-14 13:04:06,794 INFO L175 Difference]: Start difference. First operand has 206 places, 246 transitions, 3359 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:04:06,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 278 transitions, 4075 flow [2024-06-14 13:04:07,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 278 transitions, 4008 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:04:07,145 INFO L231 Difference]: Finished difference. Result has 207 places, 245 transitions, 3403 flow [2024-06-14 13:04:07,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3292, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3403, PETRI_PLACES=207, PETRI_TRANSITIONS=245} [2024-06-14 13:04:07,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-14 13:04:07,146 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 245 transitions, 3403 flow [2024-06-14 13:04:07,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:07,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:07,146 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] [2024-06-14 13:04:07,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:04:07,146 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)] === [2024-06-14 13:04:07,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:07,147 INFO L85 PathProgramCache]: Analyzing trace with hash -2023837837, now seen corresponding path program 1 times [2024-06-14 13:04:07,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:07,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307393813] [2024-06-14 13:04:07,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:07,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:10,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:10,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307393813] [2024-06-14 13:04:10,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307393813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:10,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:10,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:04:10,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877062333] [2024-06-14 13:04:10,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:10,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:04:10,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:10,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:04:10,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:04:10,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:04:10,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 245 transitions, 3403 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:10,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:10,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:04:10,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:12,834 INFO L124 PetriNetUnfolderBase]: 3680/6637 cut-off events. [2024-06-14 13:04:12,835 INFO L125 PetriNetUnfolderBase]: For 249972/249983 co-relation queries the response was YES. [2024-06-14 13:04:12,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39730 conditions, 6637 events. 3680/6637 cut-off events. For 249972/249983 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 51645 event pairs, 1130 based on Foata normal form. 19/6646 useless extension candidates. Maximal degree in co-relation 39629. Up to 4947 conditions per place. [2024-06-14 13:04:12,897 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 283 selfloop transitions, 88 changer transitions 2/379 dead transitions. [2024-06-14 13:04:12,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 379 transitions, 5976 flow [2024-06-14 13:04:12,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:04:12,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:04:12,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 13:04:12,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-14 13:04:12,899 INFO L175 Difference]: Start difference. First operand has 207 places, 245 transitions, 3403 flow. Second operand 10 states and 184 transitions. [2024-06-14 13:04:12,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 379 transitions, 5976 flow [2024-06-14 13:04:13,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 379 transitions, 5749 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:13,308 INFO L231 Difference]: Finished difference. Result has 217 places, 304 transitions, 4499 flow [2024-06-14 13:04:13,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3256, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4499, PETRI_PLACES=217, PETRI_TRANSITIONS=304} [2024-06-14 13:04:13,308 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-14 13:04:13,308 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 304 transitions, 4499 flow [2024-06-14 13:04:13,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:13,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:13,308 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] [2024-06-14 13:04:13,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:04:13,309 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)] === [2024-06-14 13:04:13,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:13,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1871799811, now seen corresponding path program 2 times [2024-06-14 13:04:13,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:13,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278980963] [2024-06-14 13:04:13,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:13,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:16,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:16,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278980963] [2024-06-14 13:04:16,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278980963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:16,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:16,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:16,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059625443] [2024-06-14 13:04:16,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:16,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:16,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:16,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:16,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:16,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:04:16,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 304 transitions, 4499 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:16,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:16,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:04:16,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:19,184 INFO L124 PetriNetUnfolderBase]: 3630/6555 cut-off events. [2024-06-14 13:04:19,184 INFO L125 PetriNetUnfolderBase]: For 253671/253686 co-relation queries the response was YES. [2024-06-14 13:04:19,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39907 conditions, 6555 events. 3630/6555 cut-off events. For 253671/253686 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 50820 event pairs, 880 based on Foata normal form. 32/6577 useless extension candidates. Maximal degree in co-relation 39800. Up to 4517 conditions per place. [2024-06-14 13:04:19,240 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 232 selfloop transitions, 115 changer transitions 0/353 dead transitions. [2024-06-14 13:04:19,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 353 transitions, 5537 flow [2024-06-14 13:04:19,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:19,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:19,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 13:04:19,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-14 13:04:19,242 INFO L175 Difference]: Start difference. First operand has 217 places, 304 transitions, 4499 flow. Second operand 8 states and 154 transitions. [2024-06-14 13:04:19,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 353 transitions, 5537 flow [2024-06-14 13:04:19,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 353 transitions, 5477 flow, removed 29 selfloop flow, removed 1 redundant places. [2024-06-14 13:04:19,673 INFO L231 Difference]: Finished difference. Result has 224 places, 304 transitions, 4688 flow [2024-06-14 13:04:19,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4445, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4688, PETRI_PLACES=224, PETRI_TRANSITIONS=304} [2024-06-14 13:04:19,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-14 13:04:19,673 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 304 transitions, 4688 flow [2024-06-14 13:04:19,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:19,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:19,674 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] [2024-06-14 13:04:19,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:04:19,674 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)] === [2024-06-14 13:04:19,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:19,674 INFO L85 PathProgramCache]: Analyzing trace with hash 467750943, now seen corresponding path program 7 times [2024-06-14 13:04:19,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:19,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211978892] [2024-06-14 13:04:19,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:19,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:22,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:22,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211978892] [2024-06-14 13:04:22,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211978892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:22,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:22,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:22,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408507160] [2024-06-14 13:04:22,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:22,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:22,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:22,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:22,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:22,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:04:22,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 304 transitions, 4688 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:22,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:22,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:04:22,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:24,156 INFO L124 PetriNetUnfolderBase]: 3676/6623 cut-off events. [2024-06-14 13:04:24,156 INFO L125 PetriNetUnfolderBase]: For 251569/251576 co-relation queries the response was YES. [2024-06-14 13:04:24,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40954 conditions, 6623 events. 3676/6623 cut-off events. For 251569/251576 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 51365 event pairs, 1301 based on Foata normal form. 18/6631 useless extension candidates. Maximal degree in co-relation 40844. Up to 5656 conditions per place. [2024-06-14 13:04:24,227 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 257 selfloop transitions, 72 changer transitions 0/335 dead transitions. [2024-06-14 13:04:24,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 335 transitions, 5662 flow [2024-06-14 13:04:24,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:24,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:24,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:04:24,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-14 13:04:24,229 INFO L175 Difference]: Start difference. First operand has 224 places, 304 transitions, 4688 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:04:24,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 335 transitions, 5662 flow [2024-06-14 13:04:24,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 335 transitions, 5386 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 13:04:24,689 INFO L231 Difference]: Finished difference. Result has 224 places, 313 transitions, 4710 flow [2024-06-14 13:04:24,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4414, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4710, PETRI_PLACES=224, PETRI_TRANSITIONS=313} [2024-06-14 13:04:24,690 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-14 13:04:24,690 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 313 transitions, 4710 flow [2024-06-14 13:04:24,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:24,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:24,690 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] [2024-06-14 13:04:24,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:04:24,690 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)] === [2024-06-14 13:04:24,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:24,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1766785177, now seen corresponding path program 3 times [2024-06-14 13:04:24,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:24,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111101086] [2024-06-14 13:04:24,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:24,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:27,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:27,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111101086] [2024-06-14 13:04:27,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111101086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:27,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:27,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:27,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165746852] [2024-06-14 13:04:27,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:27,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:27,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:27,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:27,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:27,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:04:27,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 313 transitions, 4710 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:27,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:27,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:04:27,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:29,714 INFO L124 PetriNetUnfolderBase]: 3688/6648 cut-off events. [2024-06-14 13:04:29,715 INFO L125 PetriNetUnfolderBase]: For 247452/247459 co-relation queries the response was YES. [2024-06-14 13:04:29,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40315 conditions, 6648 events. 3688/6648 cut-off events. For 247452/247459 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 51457 event pairs, 993 based on Foata normal form. 24/6660 useless extension candidates. Maximal degree in co-relation 40205. Up to 4596 conditions per place. [2024-06-14 13:04:29,795 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 250 selfloop transitions, 100 changer transitions 0/356 dead transitions. [2024-06-14 13:04:29,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 356 transitions, 5767 flow [2024-06-14 13:04:29,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:29,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:29,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:04:29,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-14 13:04:29,796 INFO L175 Difference]: Start difference. First operand has 224 places, 313 transitions, 4710 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:04:29,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 356 transitions, 5767 flow [2024-06-14 13:04:30,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 356 transitions, 5627 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-14 13:04:30,263 INFO L231 Difference]: Finished difference. Result has 229 places, 316 transitions, 4832 flow [2024-06-14 13:04:30,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4573, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4832, PETRI_PLACES=229, PETRI_TRANSITIONS=316} [2024-06-14 13:04:30,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-14 13:04:30,263 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 316 transitions, 4832 flow [2024-06-14 13:04:30,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:30,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:30,264 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] [2024-06-14 13:04:30,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:04:30,264 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)] === [2024-06-14 13:04:30,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:30,264 INFO L85 PathProgramCache]: Analyzing trace with hash -938346889, now seen corresponding path program 4 times [2024-06-14 13:04:30,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:30,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65395471] [2024-06-14 13:04:30,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:30,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:32,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:32,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65395471] [2024-06-14 13:04:32,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65395471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:32,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:32,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:32,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643600359] [2024-06-14 13:04:32,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:32,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:32,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:32,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:32,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:32,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:04:32,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 316 transitions, 4832 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:32,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:32,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:04:32,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:35,272 INFO L124 PetriNetUnfolderBase]: 3729/6714 cut-off events. [2024-06-14 13:04:35,272 INFO L125 PetriNetUnfolderBase]: For 250990/251019 co-relation queries the response was YES. [2024-06-14 13:04:35,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40971 conditions, 6714 events. 3729/6714 cut-off events. For 250990/251019 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 51986 event pairs, 1023 based on Foata normal form. 23/6710 useless extension candidates. Maximal degree in co-relation 40860. Up to 4618 conditions per place. [2024-06-14 13:04:35,330 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 239 selfloop transitions, 116 changer transitions 0/361 dead transitions. [2024-06-14 13:04:35,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 361 transitions, 5933 flow [2024-06-14 13:04:35,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:04:35,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:04:35,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 13:04:35,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-14 13:04:35,331 INFO L175 Difference]: Start difference. First operand has 229 places, 316 transitions, 4832 flow. Second operand 9 states and 158 transitions. [2024-06-14 13:04:35,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 361 transitions, 5933 flow [2024-06-14 13:04:35,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 361 transitions, 5778 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:35,760 INFO L231 Difference]: Finished difference. Result has 233 places, 319 transitions, 4971 flow [2024-06-14 13:04:35,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4680, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4971, PETRI_PLACES=233, PETRI_TRANSITIONS=319} [2024-06-14 13:04:35,761 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-14 13:04:35,761 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 319 transitions, 4971 flow [2024-06-14 13:04:35,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:35,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:35,761 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] [2024-06-14 13:04:35,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:04:35,761 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)] === [2024-06-14 13:04:35,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:35,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1284681697, now seen corresponding path program 8 times [2024-06-14 13:04:35,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:35,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091601054] [2024-06-14 13:04:35,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:35,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:38,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:38,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091601054] [2024-06-14 13:04:38,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091601054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:38,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:38,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:38,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968174751] [2024-06-14 13:04:38,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:38,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:38,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:38,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:38,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:38,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:04:38,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 319 transitions, 4971 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:38,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:38,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:04:38,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:40,326 INFO L124 PetriNetUnfolderBase]: 3742/6739 cut-off events. [2024-06-14 13:04:40,327 INFO L125 PetriNetUnfolderBase]: For 253790/253822 co-relation queries the response was YES. [2024-06-14 13:04:40,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41390 conditions, 6739 events. 3742/6739 cut-off events. For 253790/253822 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 52374 event pairs, 1328 based on Foata normal form. 17/6735 useless extension candidates. Maximal degree in co-relation 41278. Up to 5797 conditions per place. [2024-06-14 13:04:40,398 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 254 selfloop transitions, 79 changer transitions 0/339 dead transitions. [2024-06-14 13:04:40,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 339 transitions, 5878 flow [2024-06-14 13:04:40,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:40,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:04:40,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-14 13:04:40,399 INFO L175 Difference]: Start difference. First operand has 233 places, 319 transitions, 4971 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:04:40,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 339 transitions, 5878 flow [2024-06-14 13:04:40,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 339 transitions, 5537 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 13:04:40,903 INFO L231 Difference]: Finished difference. Result has 233 places, 324 transitions, 4905 flow [2024-06-14 13:04:40,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4630, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4905, PETRI_PLACES=233, PETRI_TRANSITIONS=324} [2024-06-14 13:04:40,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-14 13:04:40,903 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 324 transitions, 4905 flow [2024-06-14 13:04:40,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:40,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:40,904 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] [2024-06-14 13:04:40,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:04:40,904 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)] === [2024-06-14 13:04:40,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:40,904 INFO L85 PathProgramCache]: Analyzing trace with hash 101179869, now seen corresponding path program 9 times [2024-06-14 13:04:40,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:40,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189071787] [2024-06-14 13:04:40,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:40,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:40,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:43,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:43,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189071787] [2024-06-14 13:04:43,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189071787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:43,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:43,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:43,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435311391] [2024-06-14 13:04:43,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:43,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:43,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:43,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:43,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:43,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:04:43,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 324 transitions, 4905 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:43,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:43,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:04:43,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:45,845 INFO L124 PetriNetUnfolderBase]: 3760/6786 cut-off events. [2024-06-14 13:04:45,845 INFO L125 PetriNetUnfolderBase]: For 260913/260945 co-relation queries the response was YES. [2024-06-14 13:04:45,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41166 conditions, 6786 events. 3760/6786 cut-off events. For 260913/260945 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 52873 event pairs, 1315 based on Foata normal form. 17/6784 useless extension candidates. Maximal degree in co-relation 41054. Up to 5740 conditions per place. [2024-06-14 13:04:45,915 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 255 selfloop transitions, 92 changer transitions 0/353 dead transitions. [2024-06-14 13:04:45,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 353 transitions, 6054 flow [2024-06-14 13:04:45,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:45,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:45,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:04:45,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-14 13:04:45,916 INFO L175 Difference]: Start difference. First operand has 233 places, 324 transitions, 4905 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:04:45,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 353 transitions, 6054 flow [2024-06-14 13:04:46,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 353 transitions, 5849 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 13:04:46,376 INFO L231 Difference]: Finished difference. Result has 238 places, 330 transitions, 5072 flow [2024-06-14 13:04:46,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4700, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5072, PETRI_PLACES=238, PETRI_TRANSITIONS=330} [2024-06-14 13:04:46,376 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-14 13:04:46,376 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 330 transitions, 5072 flow [2024-06-14 13:04:46,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:46,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:46,377 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] [2024-06-14 13:04:46,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:04:46,377 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)] === [2024-06-14 13:04:46,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:46,377 INFO L85 PathProgramCache]: Analyzing trace with hash -2118566773, now seen corresponding path program 5 times [2024-06-14 13:04:46,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:46,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688637601] [2024-06-14 13:04:46,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:46,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:49,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:49,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688637601] [2024-06-14 13:04:49,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688637601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:49,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:49,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:49,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861734624] [2024-06-14 13:04:49,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:49,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:49,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:49,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:49,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:49,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:04:49,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 330 transitions, 5072 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:49,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:49,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:04:49,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:52,178 INFO L124 PetriNetUnfolderBase]: 3734/6755 cut-off events. [2024-06-14 13:04:52,178 INFO L125 PetriNetUnfolderBase]: For 267766/267795 co-relation queries the response was YES. [2024-06-14 13:04:52,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40792 conditions, 6755 events. 3734/6755 cut-off events. For 267766/267795 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 52778 event pairs, 1055 based on Foata normal form. 23/6748 useless extension candidates. Maximal degree in co-relation 40678. Up to 4653 conditions per place. [2024-06-14 13:04:52,242 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 241 selfloop transitions, 115 changer transitions 0/362 dead transitions. [2024-06-14 13:04:52,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 362 transitions, 5965 flow [2024-06-14 13:04:52,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:52,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:52,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:04:52,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 13:04:52,244 INFO L175 Difference]: Start difference. First operand has 238 places, 330 transitions, 5072 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:04:52,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 362 transitions, 5965 flow [2024-06-14 13:04:52,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 362 transitions, 5777 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-14 13:04:52,764 INFO L231 Difference]: Finished difference. Result has 242 places, 330 transitions, 5124 flow [2024-06-14 13:04:52,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4886, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5124, PETRI_PLACES=242, PETRI_TRANSITIONS=330} [2024-06-14 13:04:52,765 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-14 13:04:52,765 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 330 transitions, 5124 flow [2024-06-14 13:04:52,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:52,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:52,765 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] [2024-06-14 13:04:52,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:04:52,765 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)] === [2024-06-14 13:04:52,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:52,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1107550177, now seen corresponding path program 10 times [2024-06-14 13:04:52,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:52,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739615620] [2024-06-14 13:04:52,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:52,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:55,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:55,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739615620] [2024-06-14 13:04:55,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739615620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:55,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:55,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:55,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603640353] [2024-06-14 13:04:55,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:55,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:55,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:55,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:55,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:55,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:04:55,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 330 transitions, 5124 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:55,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:55,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:04:55,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:57,349 INFO L124 PetriNetUnfolderBase]: 3742/6742 cut-off events. [2024-06-14 13:04:57,349 INFO L125 PetriNetUnfolderBase]: For 268745/268774 co-relation queries the response was YES. [2024-06-14 13:04:57,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41278 conditions, 6742 events. 3742/6742 cut-off events. For 268745/268774 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 52398 event pairs, 1065 based on Foata normal form. 19/6734 useless extension candidates. Maximal degree in co-relation 41162. Up to 4641 conditions per place. [2024-06-14 13:04:57,420 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 232 selfloop transitions, 123 changer transitions 0/361 dead transitions. [2024-06-14 13:04:57,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 361 transitions, 6068 flow [2024-06-14 13:04:57,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:57,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:04:57,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 13:04:57,421 INFO L175 Difference]: Start difference. First operand has 242 places, 330 transitions, 5124 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:04:57,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 361 transitions, 6068 flow [2024-06-14 13:04:58,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 361 transitions, 5741 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 13:04:58,268 INFO L231 Difference]: Finished difference. Result has 242 places, 334 transitions, 5164 flow [2024-06-14 13:04:58,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4797, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5164, PETRI_PLACES=242, PETRI_TRANSITIONS=334} [2024-06-14 13:04:58,269 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-14 13:04:58,269 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 334 transitions, 5164 flow [2024-06-14 13:04:58,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:58,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:58,269 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] [2024-06-14 13:04:58,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:04:58,269 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)] === [2024-06-14 13:04:58,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:58,269 INFO L85 PathProgramCache]: Analyzing trace with hash -884950833, now seen corresponding path program 1 times [2024-06-14 13:04:58,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:58,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189063173] [2024-06-14 13:04:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:58,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:00,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:00,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:00,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189063173] [2024-06-14 13:05:00,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189063173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:00,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:00,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:00,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731731026] [2024-06-14 13:05:00,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:00,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:00,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:00,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:00,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:01,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:05:01,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 334 transitions, 5164 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:01,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:01,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:05:01,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:02,902 INFO L124 PetriNetUnfolderBase]: 3734/6727 cut-off events. [2024-06-14 13:05:02,902 INFO L125 PetriNetUnfolderBase]: For 265016/265023 co-relation queries the response was YES. [2024-06-14 13:05:02,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41188 conditions, 6727 events. 3734/6727 cut-off events. For 265016/265023 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 52350 event pairs, 1312 based on Foata normal form. 10/6725 useless extension candidates. Maximal degree in co-relation 41071. Up to 5917 conditions per place. [2024-06-14 13:05:02,976 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 319 selfloop transitions, 28 changer transitions 0/353 dead transitions. [2024-06-14 13:05:02,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 353 transitions, 5922 flow [2024-06-14 13:05:02,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:05:02,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:05:02,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 13:05:02,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 13:05:02,977 INFO L175 Difference]: Start difference. First operand has 242 places, 334 transitions, 5164 flow. Second operand 8 states and 132 transitions. [2024-06-14 13:05:02,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 353 transitions, 5922 flow [2024-06-14 13:05:03,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 353 transitions, 5598 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-14 13:05:03,679 INFO L231 Difference]: Finished difference. Result has 244 places, 334 transitions, 4903 flow [2024-06-14 13:05:03,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4840, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4903, PETRI_PLACES=244, PETRI_TRANSITIONS=334} [2024-06-14 13:05:03,679 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-14 13:05:03,679 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 334 transitions, 4903 flow [2024-06-14 13:05:03,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:03,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:03,680 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, 1] [2024-06-14 13:05:03,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:05:03,680 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)] === [2024-06-14 13:05:03,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:03,680 INFO L85 PathProgramCache]: Analyzing trace with hash -560312413, now seen corresponding path program 1 times [2024-06-14 13:05:03,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:03,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917202602] [2024-06-14 13:05:03,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:03,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:06,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:06,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917202602] [2024-06-14 13:05:06,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917202602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:06,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:06,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:06,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685888823] [2024-06-14 13:05:06,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:06,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:06,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:06,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:06,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:06,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:05:06,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 334 transitions, 4903 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:06,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:06,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:05:06,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:09,011 INFO L124 PetriNetUnfolderBase]: 3890/7031 cut-off events. [2024-06-14 13:05:09,011 INFO L125 PetriNetUnfolderBase]: For 325142/325175 co-relation queries the response was YES. [2024-06-14 13:05:09,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43048 conditions, 7031 events. 3890/7031 cut-off events. For 325142/325175 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 55192 event pairs, 708 based on Foata normal form. 46/7067 useless extension candidates. Maximal degree in co-relation 42930. Up to 2790 conditions per place. [2024-06-14 13:05:09,086 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 290 selfloop transitions, 93 changer transitions 16/405 dead transitions. [2024-06-14 13:05:09,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 405 transitions, 6442 flow [2024-06-14 13:05:09,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:09,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:09,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-14 13:05:09,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-14 13:05:09,087 INFO L175 Difference]: Start difference. First operand has 244 places, 334 transitions, 4903 flow. Second operand 9 states and 186 transitions. [2024-06-14 13:05:09,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 405 transitions, 6442 flow [2024-06-14 13:05:09,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 405 transitions, 6358 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:05:09,793 INFO L231 Difference]: Finished difference. Result has 247 places, 331 transitions, 5069 flow [2024-06-14 13:05:09,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4819, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5069, PETRI_PLACES=247, PETRI_TRANSITIONS=331} [2024-06-14 13:05:09,794 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-14 13:05:09,794 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 331 transitions, 5069 flow [2024-06-14 13:05:09,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:09,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:09,794 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, 1] [2024-06-14 13:05:09,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:05:09,794 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)] === [2024-06-14 13:05:09,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:09,795 INFO L85 PathProgramCache]: Analyzing trace with hash 2093576613, now seen corresponding path program 2 times [2024-06-14 13:05:09,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:09,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754795125] [2024-06-14 13:05:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:09,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:12,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:12,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754795125] [2024-06-14 13:05:12,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754795125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:12,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:12,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:12,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438102655] [2024-06-14 13:05:12,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:12,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:12,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:12,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:12,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:12,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:05:12,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 331 transitions, 5069 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:12,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:12,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:05:12,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:14,992 INFO L124 PetriNetUnfolderBase]: 3924/7091 cut-off events. [2024-06-14 13:05:14,992 INFO L125 PetriNetUnfolderBase]: For 366261/366294 co-relation queries the response was YES. [2024-06-14 13:05:15,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46131 conditions, 7091 events. 3924/7091 cut-off events. For 366261/366294 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 55804 event pairs, 746 based on Foata normal form. 28/7109 useless extension candidates. Maximal degree in co-relation 46012. Up to 2790 conditions per place. [2024-06-14 13:05:15,077 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 283 selfloop transitions, 93 changer transitions 13/395 dead transitions. [2024-06-14 13:05:15,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 395 transitions, 6526 flow [2024-06-14 13:05:15,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:15,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:15,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-14 13:05:15,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-14 13:05:15,078 INFO L175 Difference]: Start difference. First operand has 247 places, 331 transitions, 5069 flow. Second operand 9 states and 180 transitions. [2024-06-14 13:05:15,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 395 transitions, 6526 flow [2024-06-14 13:05:15,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 395 transitions, 6374 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-14 13:05:15,791 INFO L231 Difference]: Finished difference. Result has 246 places, 329 transitions, 5112 flow [2024-06-14 13:05:15,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4934, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5112, PETRI_PLACES=246, PETRI_TRANSITIONS=329} [2024-06-14 13:05:15,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-14 13:05:15,792 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 329 transitions, 5112 flow [2024-06-14 13:05:15,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:15,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:15,792 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, 1] [2024-06-14 13:05:15,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:05:15,792 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)] === [2024-06-14 13:05:15,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:15,793 INFO L85 PathProgramCache]: Analyzing trace with hash -473620603, now seen corresponding path program 3 times [2024-06-14 13:05:15,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:15,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161433418] [2024-06-14 13:05:15,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:15,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:20,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:20,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:20,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161433418] [2024-06-14 13:05:20,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161433418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:20,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:20,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:20,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409027373] [2024-06-14 13:05:20,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:20,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:20,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:20,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:20,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:20,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:05:20,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 329 transitions, 5112 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:20,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:20,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:05:20,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:22,657 INFO L124 PetriNetUnfolderBase]: 3849/6962 cut-off events. [2024-06-14 13:05:22,658 INFO L125 PetriNetUnfolderBase]: For 356846/356851 co-relation queries the response was YES. [2024-06-14 13:05:22,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44611 conditions, 6962 events. 3849/6962 cut-off events. For 356846/356851 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 54909 event pairs, 1355 based on Foata normal form. 28/6976 useless extension candidates. Maximal degree in co-relation 44493. Up to 5499 conditions per place. [2024-06-14 13:05:22,722 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 318 selfloop transitions, 21 changer transitions 33/378 dead transitions. [2024-06-14 13:05:22,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 378 transitions, 6194 flow [2024-06-14 13:05:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:05:22,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:05:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-14 13:05:22,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-14 13:05:22,723 INFO L175 Difference]: Start difference. First operand has 246 places, 329 transitions, 5112 flow. Second operand 10 states and 182 transitions. [2024-06-14 13:05:22,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 378 transitions, 6194 flow [2024-06-14 13:05:23,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 378 transitions, 5997 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 13:05:23,425 INFO L231 Difference]: Finished difference. Result has 244 places, 318 transitions, 4868 flow [2024-06-14 13:05:23,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4921, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4868, PETRI_PLACES=244, PETRI_TRANSITIONS=318} [2024-06-14 13:05:23,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-14 13:05:23,426 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 318 transitions, 4868 flow [2024-06-14 13:05:23,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:23,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:23,426 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, 1] [2024-06-14 13:05:23,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:05:23,426 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)] === [2024-06-14 13:05:23,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:23,427 INFO L85 PathProgramCache]: Analyzing trace with hash -296220313, now seen corresponding path program 4 times [2024-06-14 13:05:23,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:23,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86542928] [2024-06-14 13:05:23,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:23,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:27,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:27,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86542928] [2024-06-14 13:05:27,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86542928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:27,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:27,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:27,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23039387] [2024-06-14 13:05:27,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:27,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:27,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:27,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:27,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:27,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:05:27,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 318 transitions, 4868 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:27,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:27,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:05:27,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:29,503 INFO L124 PetriNetUnfolderBase]: 3525/6338 cut-off events. [2024-06-14 13:05:29,504 INFO L125 PetriNetUnfolderBase]: For 284981/284985 co-relation queries the response was YES. [2024-06-14 13:05:29,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40537 conditions, 6338 events. 3525/6338 cut-off events. For 284981/284985 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 48941 event pairs, 1319 based on Foata normal form. 9/6333 useless extension candidates. Maximal degree in co-relation 40421. Up to 5582 conditions per place. [2024-06-14 13:05:29,569 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 310 selfloop transitions, 19 changer transitions 10/345 dead transitions. [2024-06-14 13:05:29,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 345 transitions, 5662 flow [2024-06-14 13:05:29,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:29,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:29,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 13:05:29,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-14 13:05:29,570 INFO L175 Difference]: Start difference. First operand has 244 places, 318 transitions, 4868 flow. Second operand 9 states and 149 transitions. [2024-06-14 13:05:29,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 345 transitions, 5662 flow [2024-06-14 13:05:30,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 345 transitions, 5590 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-14 13:05:30,253 INFO L231 Difference]: Finished difference. Result has 235 places, 316 transitions, 4817 flow [2024-06-14 13:05:30,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4800, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4817, PETRI_PLACES=235, PETRI_TRANSITIONS=316} [2024-06-14 13:05:30,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-14 13:05:30,254 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 316 transitions, 4817 flow [2024-06-14 13:05:30,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:30,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:30,254 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, 1] [2024-06-14 13:05:30,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:05:30,255 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)] === [2024-06-14 13:05:30,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:30,255 INFO L85 PathProgramCache]: Analyzing trace with hash -296310523, now seen corresponding path program 5 times [2024-06-14 13:05:30,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:30,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380298812] [2024-06-14 13:05:30,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:30,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:33,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:33,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380298812] [2024-06-14 13:05:33,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380298812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:33,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:33,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:33,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474173507] [2024-06-14 13:05:33,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:33,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:33,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:33,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:33,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:33,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:05:33,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 316 transitions, 4817 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:33,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:33,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:05:33,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:35,494 INFO L124 PetriNetUnfolderBase]: 3674/6627 cut-off events. [2024-06-14 13:05:35,494 INFO L125 PetriNetUnfolderBase]: For 286572/286604 co-relation queries the response was YES. [2024-06-14 13:05:35,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42117 conditions, 6627 events. 3674/6627 cut-off events. For 286572/286604 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 51788 event pairs, 811 based on Foata normal form. 27/6638 useless extension candidates. Maximal degree in co-relation 42005. Up to 4239 conditions per place. [2024-06-14 13:05:35,566 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 259 selfloop transitions, 90 changer transitions 15/370 dead transitions. [2024-06-14 13:05:35,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 370 transitions, 6119 flow [2024-06-14 13:05:35,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:35,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:35,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 13:05:35,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-14 13:05:35,567 INFO L175 Difference]: Start difference. First operand has 235 places, 316 transitions, 4817 flow. Second operand 9 states and 169 transitions. [2024-06-14 13:05:35,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 370 transitions, 6119 flow [2024-06-14 13:05:36,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 370 transitions, 6063 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 13:05:36,248 INFO L231 Difference]: Finished difference. Result has 234 places, 311 transitions, 4907 flow [2024-06-14 13:05:36,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4773, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4907, PETRI_PLACES=234, PETRI_TRANSITIONS=311} [2024-06-14 13:05:36,248 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-14 13:05:36,248 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 311 transitions, 4907 flow [2024-06-14 13:05:36,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:36,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:36,249 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, 1] [2024-06-14 13:05:36,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:05:36,249 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)] === [2024-06-14 13:05:36,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:36,250 INFO L85 PathProgramCache]: Analyzing trace with hash 6003493, now seen corresponding path program 6 times [2024-06-14 13:05:36,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:36,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122112446] [2024-06-14 13:05:36,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:36,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:39,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:39,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122112446] [2024-06-14 13:05:39,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122112446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:39,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:39,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:39,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614056685] [2024-06-14 13:05:39,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:39,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:39,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:39,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:39,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:39,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:05:39,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 311 transitions, 4907 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:39,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:39,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:05:39,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:41,499 INFO L124 PetriNetUnfolderBase]: 3618/6563 cut-off events. [2024-06-14 13:05:41,499 INFO L125 PetriNetUnfolderBase]: For 289541/289549 co-relation queries the response was YES. [2024-06-14 13:05:41,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41278 conditions, 6563 events. 3618/6563 cut-off events. For 289541/289549 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 51716 event pairs, 692 based on Foata normal form. 44/6597 useless extension candidates. Maximal degree in co-relation 41166. Up to 2659 conditions per place. [2024-06-14 13:05:41,569 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 260 selfloop transitions, 77 changer transitions 23/366 dead transitions. [2024-06-14 13:05:41,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 366 transitions, 6094 flow [2024-06-14 13:05:41,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:05:41,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:05:41,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 13:05:41,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-14 13:05:41,571 INFO L175 Difference]: Start difference. First operand has 234 places, 311 transitions, 4907 flow. Second operand 10 states and 184 transitions. [2024-06-14 13:05:41,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 366 transitions, 6094 flow [2024-06-14 13:05:42,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 366 transitions, 5860 flow, removed 35 selfloop flow, removed 11 redundant places. [2024-06-14 13:05:42,029 INFO L231 Difference]: Finished difference. Result has 229 places, 299 transitions, 4647 flow [2024-06-14 13:05:42,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4689, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4647, PETRI_PLACES=229, PETRI_TRANSITIONS=299} [2024-06-14 13:05:42,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-14 13:05:42,029 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 299 transitions, 4647 flow [2024-06-14 13:05:42,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:42,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:42,029 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, 1] [2024-06-14 13:05:42,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:05:42,032 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)] === [2024-06-14 13:05:42,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:42,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1194292859, now seen corresponding path program 7 times [2024-06-14 13:05:42,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:42,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184196012] [2024-06-14 13:05:42,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:42,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:44,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:44,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184196012] [2024-06-14 13:05:44,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184196012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:44,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:44,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:44,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130123076] [2024-06-14 13:05:44,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:44,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:44,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:44,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:44,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:45,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:05:45,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 299 transitions, 4647 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:45,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:45,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:05:45,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:47,319 INFO L124 PetriNetUnfolderBase]: 3104/5600 cut-off events. [2024-06-14 13:05:47,320 INFO L125 PetriNetUnfolderBase]: For 220174/220182 co-relation queries the response was YES. [2024-06-14 13:05:47,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34991 conditions, 5600 events. 3104/5600 cut-off events. For 220174/220182 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 42793 event pairs, 848 based on Foata normal form. 44/5636 useless extension candidates. Maximal degree in co-relation 34884. Up to 3893 conditions per place. [2024-06-14 13:05:47,375 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 254 selfloop transitions, 60 changer transitions 29/349 dead transitions. [2024-06-14 13:05:47,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 349 transitions, 5733 flow [2024-06-14 13:05:47,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:05:47,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:05:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-14 13:05:47,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:05:47,377 INFO L175 Difference]: Start difference. First operand has 229 places, 299 transitions, 4647 flow. Second operand 11 states and 198 transitions. [2024-06-14 13:05:47,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 349 transitions, 5733 flow [2024-06-14 13:05:47,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 349 transitions, 5631 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 13:05:47,786 INFO L231 Difference]: Finished difference. Result has 228 places, 279 transitions, 4264 flow [2024-06-14 13:05:47,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4557, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4264, PETRI_PLACES=228, PETRI_TRANSITIONS=279} [2024-06-14 13:05:47,787 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-14 13:05:47,787 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 279 transitions, 4264 flow [2024-06-14 13:05:47,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:47,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:47,787 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, 1] [2024-06-14 13:05:47,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:05:47,787 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)] === [2024-06-14 13:05:47,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:47,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1185038429, now seen corresponding path program 8 times [2024-06-14 13:05:47,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:47,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503753650] [2024-06-14 13:05:47,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:47,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:50,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:50,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503753650] [2024-06-14 13:05:50,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503753650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:50,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:50,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:50,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535935905] [2024-06-14 13:05:50,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:50,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:50,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:50,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:50,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:50,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:05:50,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 279 transitions, 4264 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:50,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:50,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:05:50,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:52,779 INFO L124 PetriNetUnfolderBase]: 2902/5250 cut-off events. [2024-06-14 13:05:52,779 INFO L125 PetriNetUnfolderBase]: For 184276/184284 co-relation queries the response was YES. [2024-06-14 13:05:52,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31916 conditions, 5250 events. 2902/5250 cut-off events. For 184276/184284 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 40008 event pairs, 778 based on Foata normal form. 52/5294 useless extension candidates. Maximal degree in co-relation 31811. Up to 3826 conditions per place. [2024-06-14 13:05:52,828 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 230 selfloop transitions, 66 changer transitions 21/323 dead transitions. [2024-06-14 13:05:52,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 323 transitions, 5242 flow [2024-06-14 13:05:52,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:05:52,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:05:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 211 transitions. [2024-06-14 13:05:52,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41865079365079366 [2024-06-14 13:05:52,837 INFO L175 Difference]: Start difference. First operand has 228 places, 279 transitions, 4264 flow. Second operand 12 states and 211 transitions. [2024-06-14 13:05:52,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 323 transitions, 5242 flow [2024-06-14 13:05:53,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 323 transitions, 5082 flow, removed 30 selfloop flow, removed 15 redundant places. [2024-06-14 13:05:53,181 INFO L231 Difference]: Finished difference. Result has 222 places, 271 transitions, 4088 flow [2024-06-14 13:05:53,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4118, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4088, PETRI_PLACES=222, PETRI_TRANSITIONS=271} [2024-06-14 13:05:53,181 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-14 13:05:53,181 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 271 transitions, 4088 flow [2024-06-14 13:05:53,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:53,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:53,182 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, 1] [2024-06-14 13:05:53,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:05:53,182 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)] === [2024-06-14 13:05:53,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:53,182 INFO L85 PathProgramCache]: Analyzing trace with hash 18314576, now seen corresponding path program 1 times [2024-06-14 13:05:53,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:53,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587510480] [2024-06-14 13:05:53,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:53,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:56,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:56,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587510480] [2024-06-14 13:05:56,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587510480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:56,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:56,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:56,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307670463] [2024-06-14 13:05:56,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:56,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:56,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:56,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:56,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:56,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:05:56,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 271 transitions, 4088 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:56,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:56,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:05:56,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:57,753 INFO L124 PetriNetUnfolderBase]: 2694/4867 cut-off events. [2024-06-14 13:05:57,753 INFO L125 PetriNetUnfolderBase]: For 137332/137332 co-relation queries the response was YES. [2024-06-14 13:05:57,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29813 conditions, 4867 events. 2694/4867 cut-off events. For 137332/137332 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 36522 event pairs, 913 based on Foata normal form. 2/4853 useless extension candidates. Maximal degree in co-relation 29712. Up to 4291 conditions per place. [2024-06-14 13:05:57,801 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 257 selfloop transitions, 23 changer transitions 0/286 dead transitions. [2024-06-14 13:05:57,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 286 transitions, 4748 flow [2024-06-14 13:05:57,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:05:57,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:05:57,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 13:05:57,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-14 13:05:57,802 INFO L175 Difference]: Start difference. First operand has 222 places, 271 transitions, 4088 flow. Second operand 7 states and 113 transitions. [2024-06-14 13:05:57,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 286 transitions, 4748 flow [2024-06-14 13:05:58,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 286 transitions, 4672 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 13:05:58,111 INFO L231 Difference]: Finished difference. Result has 221 places, 273 transitions, 4122 flow [2024-06-14 13:05:58,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4016, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4122, PETRI_PLACES=221, PETRI_TRANSITIONS=273} [2024-06-14 13:05:58,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-14 13:05:58,112 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 273 transitions, 4122 flow [2024-06-14 13:05:58,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:58,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:58,112 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, 1] [2024-06-14 13:05:58,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:05:58,112 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)] === [2024-06-14 13:05:58,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:58,112 INFO L85 PathProgramCache]: Analyzing trace with hash 11071395, now seen corresponding path program 9 times [2024-06-14 13:05:58,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:58,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510652248] [2024-06-14 13:05:58,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:58,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:01,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:01,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510652248] [2024-06-14 13:06:01,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510652248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:01,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:01,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:01,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369753740] [2024-06-14 13:06:01,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:01,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:01,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:01,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:01,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:01,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:06:01,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 273 transitions, 4122 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:01,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:01,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:06:01,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:03,615 INFO L124 PetriNetUnfolderBase]: 2666/4811 cut-off events. [2024-06-14 13:06:03,615 INFO L125 PetriNetUnfolderBase]: For 134145/134166 co-relation queries the response was YES. [2024-06-14 13:06:03,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29150 conditions, 4811 events. 2666/4811 cut-off events. For 134145/134166 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 35933 event pairs, 903 based on Foata normal form. 20/4811 useless extension candidates. Maximal degree in co-relation 29050. Up to 4124 conditions per place. [2024-06-14 13:06:03,662 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 240 selfloop transitions, 36 changer transitions 11/293 dead transitions. [2024-06-14 13:06:03,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 293 transitions, 4768 flow [2024-06-14 13:06:03,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:06:03,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:06:03,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:06:03,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-14 13:06:03,664 INFO L175 Difference]: Start difference. First operand has 221 places, 273 transitions, 4122 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:06:03,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 293 transitions, 4768 flow [2024-06-14 13:06:03,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 293 transitions, 4687 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:06:03,976 INFO L231 Difference]: Finished difference. Result has 224 places, 269 transitions, 4016 flow [2024-06-14 13:06:03,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4041, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4016, PETRI_PLACES=224, PETRI_TRANSITIONS=269} [2024-06-14 13:06:03,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-14 13:06:03,977 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 269 transitions, 4016 flow [2024-06-14 13:06:03,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:03,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:03,977 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, 1] [2024-06-14 13:06:03,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:06:03,977 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)] === [2024-06-14 13:06:03,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:03,978 INFO L85 PathProgramCache]: Analyzing trace with hash 7352325, now seen corresponding path program 10 times [2024-06-14 13:06:03,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:03,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280925095] [2024-06-14 13:06:03,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:03,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:07,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:07,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280925095] [2024-06-14 13:06:07,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280925095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:07,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:07,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:07,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119226093] [2024-06-14 13:06:07,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:07,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:07,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:07,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:07,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:07,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:06:07,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 269 transitions, 4016 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:07,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:07,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:06:07,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:09,042 INFO L124 PetriNetUnfolderBase]: 2561/4600 cut-off events. [2024-06-14 13:06:09,042 INFO L125 PetriNetUnfolderBase]: For 130496/130496 co-relation queries the response was YES. [2024-06-14 13:06:09,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28136 conditions, 4600 events. 2561/4600 cut-off events. For 130496/130496 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 33863 event pairs, 960 based on Foata normal form. 6/4590 useless extension candidates. Maximal degree in co-relation 28036. Up to 4058 conditions per place. [2024-06-14 13:06:09,090 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 255 selfloop transitions, 13 changer transitions 11/285 dead transitions. [2024-06-14 13:06:09,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 285 transitions, 4638 flow [2024-06-14 13:06:09,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:06:09,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:06:09,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 13:06:09,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-14 13:06:09,091 INFO L175 Difference]: Start difference. First operand has 224 places, 269 transitions, 4016 flow. Second operand 8 states and 125 transitions. [2024-06-14 13:06:09,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 285 transitions, 4638 flow [2024-06-14 13:06:09,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 285 transitions, 4482 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-14 13:06:09,379 INFO L231 Difference]: Finished difference. Result has 219 places, 265 transitions, 3836 flow [2024-06-14 13:06:09,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3860, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3836, PETRI_PLACES=219, PETRI_TRANSITIONS=265} [2024-06-14 13:06:09,379 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-14 13:06:09,379 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 265 transitions, 3836 flow [2024-06-14 13:06:09,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:09,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:09,380 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, 1] [2024-06-14 13:06:09,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:06:09,380 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)] === [2024-06-14 13:06:09,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:09,380 INFO L85 PathProgramCache]: Analyzing trace with hash 7348605, now seen corresponding path program 11 times [2024-06-14 13:06:09,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:09,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132038623] [2024-06-14 13:06:09,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:09,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:09,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:12,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:12,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132038623] [2024-06-14 13:06:12,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132038623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:12,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:12,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:12,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841552227] [2024-06-14 13:06:12,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:12,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:12,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:12,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:12,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:12,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:06:12,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 265 transitions, 3836 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:12,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:12,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:06:12,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:14,230 INFO L124 PetriNetUnfolderBase]: 2452/4377 cut-off events. [2024-06-14 13:06:14,230 INFO L125 PetriNetUnfolderBase]: For 123091/123112 co-relation queries the response was YES. [2024-06-14 13:06:14,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26586 conditions, 4377 events. 2452/4377 cut-off events. For 123091/123112 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 31544 event pairs, 737 based on Foata normal form. 20/4385 useless extension candidates. Maximal degree in co-relation 26488. Up to 3722 conditions per place. [2024-06-14 13:06:14,270 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 233 selfloop transitions, 33 changer transitions 16/288 dead transitions. [2024-06-14 13:06:14,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 288 transitions, 4488 flow [2024-06-14 13:06:14,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:06:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:06:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:06:14,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-14 13:06:14,272 INFO L175 Difference]: Start difference. First operand has 219 places, 265 transitions, 3836 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:06:14,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 288 transitions, 4488 flow [2024-06-14 13:06:14,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 288 transitions, 4442 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 13:06:14,525 INFO L231 Difference]: Finished difference. Result has 213 places, 260 transitions, 3790 flow [2024-06-14 13:06:14,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3790, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3790, PETRI_PLACES=213, PETRI_TRANSITIONS=260} [2024-06-14 13:06:14,525 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-14 13:06:14,525 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 260 transitions, 3790 flow [2024-06-14 13:06:14,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:14,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:14,526 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, 1] [2024-06-14 13:06:14,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:06:14,526 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)] === [2024-06-14 13:06:14,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:14,526 INFO L85 PathProgramCache]: Analyzing trace with hash -41363924, now seen corresponding path program 1 times [2024-06-14 13:06:14,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:14,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445325966] [2024-06-14 13:06:14,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:14,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:17,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:17,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445325966] [2024-06-14 13:06:17,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445325966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:17,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:17,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:17,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417753833] [2024-06-14 13:06:17,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:17,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:17,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:17,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:17,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:17,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:06:17,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 260 transitions, 3790 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:17,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:17,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:06:17,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:19,056 INFO L124 PetriNetUnfolderBase]: 2434/4330 cut-off events. [2024-06-14 13:06:19,056 INFO L125 PetriNetUnfolderBase]: For 129381/129389 co-relation queries the response was YES. [2024-06-14 13:06:19,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26999 conditions, 4330 events. 2434/4330 cut-off events. For 129381/129389 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 31005 event pairs, 729 based on Foata normal form. 19/4345 useless extension candidates. Maximal degree in co-relation 26904. Up to 3510 conditions per place. [2024-06-14 13:06:19,098 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 223 selfloop transitions, 75 changer transitions 1/305 dead transitions. [2024-06-14 13:06:19,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 305 transitions, 4754 flow [2024-06-14 13:06:19,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:06:19,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:06:19,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-14 13:06:19,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-14 13:06:19,100 INFO L175 Difference]: Start difference. First operand has 213 places, 260 transitions, 3790 flow. Second operand 10 states and 178 transitions. [2024-06-14 13:06:19,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 305 transitions, 4754 flow [2024-06-14 13:06:19,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 305 transitions, 4648 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-14 13:06:19,342 INFO L231 Difference]: Finished difference. Result has 207 places, 264 transitions, 3956 flow [2024-06-14 13:06:19,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3692, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3956, PETRI_PLACES=207, PETRI_TRANSITIONS=264} [2024-06-14 13:06:19,342 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-14 13:06:19,342 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 264 transitions, 3956 flow [2024-06-14 13:06:19,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:19,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:19,343 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, 1] [2024-06-14 13:06:19,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:06:19,343 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)] === [2024-06-14 13:06:19,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:19,343 INFO L85 PathProgramCache]: Analyzing trace with hash -2103746690, now seen corresponding path program 2 times [2024-06-14 13:06:19,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:19,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11972153] [2024-06-14 13:06:19,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:19,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:21,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:21,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11972153] [2024-06-14 13:06:21,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11972153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:21,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:21,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:21,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127257928] [2024-06-14 13:06:21,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:21,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:21,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:21,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:21,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:22,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:06:22,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 264 transitions, 3956 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:22,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:22,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:06:22,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:23,675 INFO L124 PetriNetUnfolderBase]: 2433/4332 cut-off events. [2024-06-14 13:06:23,675 INFO L125 PetriNetUnfolderBase]: For 121643/121651 co-relation queries the response was YES. [2024-06-14 13:06:23,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26628 conditions, 4332 events. 2433/4332 cut-off events. For 121643/121651 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 31109 event pairs, 549 based on Foata normal form. 23/4347 useless extension candidates. Maximal degree in co-relation 26537. Up to 3262 conditions per place. [2024-06-14 13:06:23,714 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 220 selfloop transitions, 88 changer transitions 3/317 dead transitions. [2024-06-14 13:06:23,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 317 transitions, 5012 flow [2024-06-14 13:06:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:06:23,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:06:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 13:06:23,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-14 13:06:23,715 INFO L175 Difference]: Start difference. First operand has 207 places, 264 transitions, 3956 flow. Second operand 9 states and 161 transitions. [2024-06-14 13:06:23,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 317 transitions, 5012 flow [2024-06-14 13:06:23,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 317 transitions, 4833 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 13:06:23,995 INFO L231 Difference]: Finished difference. Result has 213 places, 280 transitions, 4314 flow [2024-06-14 13:06:23,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3777, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4314, PETRI_PLACES=213, PETRI_TRANSITIONS=280} [2024-06-14 13:06:23,998 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-14 13:06:23,998 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 280 transitions, 4314 flow [2024-06-14 13:06:23,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:23,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:23,998 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, 1] [2024-06-14 13:06:23,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:06:23,999 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)] === [2024-06-14 13:06:23,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:23,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1628277200, now seen corresponding path program 2 times [2024-06-14 13:06:23,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:23,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685985026] [2024-06-14 13:06:23,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:24,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:26,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:26,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685985026] [2024-06-14 13:06:26,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685985026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:26,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:26,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:26,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442040239] [2024-06-14 13:06:26,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:26,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:26,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:26,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:26,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:26,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:06:26,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 280 transitions, 4314 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:26,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:26,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:06:26,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:28,481 INFO L124 PetriNetUnfolderBase]: 2441/4344 cut-off events. [2024-06-14 13:06:28,481 INFO L125 PetriNetUnfolderBase]: For 124329/124329 co-relation queries the response was YES. [2024-06-14 13:06:28,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27458 conditions, 4344 events. 2441/4344 cut-off events. For 124329/124329 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 31098 event pairs, 528 based on Foata normal form. 8/4344 useless extension candidates. Maximal degree in co-relation 27362. Up to 3265 conditions per place. [2024-06-14 13:06:28,527 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 211 selfloop transitions, 98 changer transitions 0/315 dead transitions. [2024-06-14 13:06:28,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 315 transitions, 5229 flow [2024-06-14 13:06:28,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:06:28,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:06:28,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:06:28,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-14 13:06:28,530 INFO L175 Difference]: Start difference. First operand has 213 places, 280 transitions, 4314 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:06:28,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 315 transitions, 5229 flow [2024-06-14 13:06:28,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 315 transitions, 5162 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-14 13:06:28,826 INFO L231 Difference]: Finished difference. Result has 222 places, 292 transitions, 4780 flow [2024-06-14 13:06:28,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4247, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4780, PETRI_PLACES=222, PETRI_TRANSITIONS=292} [2024-06-14 13:06:28,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-14 13:06:28,827 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 292 transitions, 4780 flow [2024-06-14 13:06:28,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:28,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:28,827 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, 1] [2024-06-14 13:06:28,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:06:28,827 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)] === [2024-06-14 13:06:28,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:28,828 INFO L85 PathProgramCache]: Analyzing trace with hash -72672658, now seen corresponding path program 3 times [2024-06-14 13:06:28,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:28,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322933294] [2024-06-14 13:06:28,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:28,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:31,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:31,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322933294] [2024-06-14 13:06:31,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322933294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:31,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:31,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:31,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290336363] [2024-06-14 13:06:31,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:31,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:31,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:31,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:31,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:31,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:06:31,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 292 transitions, 4780 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:31,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:31,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:06:31,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:33,557 INFO L124 PetriNetUnfolderBase]: 2482/4423 cut-off events. [2024-06-14 13:06:33,557 INFO L125 PetriNetUnfolderBase]: For 134638/134638 co-relation queries the response was YES. [2024-06-14 13:06:33,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28979 conditions, 4423 events. 2482/4423 cut-off events. For 134638/134638 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 31882 event pairs, 752 based on Foata normal form. 9/4424 useless extension candidates. Maximal degree in co-relation 28878. Up to 3648 conditions per place. [2024-06-14 13:06:33,597 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 246 selfloop transitions, 89 changer transitions 1/342 dead transitions. [2024-06-14 13:06:33,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 342 transitions, 5982 flow [2024-06-14 13:06:33,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:06:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:06:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 210 transitions. [2024-06-14 13:06:33,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-14 13:06:33,599 INFO L175 Difference]: Start difference. First operand has 222 places, 292 transitions, 4780 flow. Second operand 13 states and 210 transitions. [2024-06-14 13:06:33,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 342 transitions, 5982 flow [2024-06-14 13:06:33,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 342 transitions, 5906 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-14 13:06:33,885 INFO L231 Difference]: Finished difference. Result has 235 places, 312 transitions, 5201 flow [2024-06-14 13:06:33,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4704, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5201, PETRI_PLACES=235, PETRI_TRANSITIONS=312} [2024-06-14 13:06:33,885 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-14 13:06:33,885 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 312 transitions, 5201 flow [2024-06-14 13:06:33,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:33,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:33,886 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, 1] [2024-06-14 13:06:33,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:06:33,886 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)] === [2024-06-14 13:06:33,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:33,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1064230094, now seen corresponding path program 4 times [2024-06-14 13:06:33,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:33,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473021094] [2024-06-14 13:06:33,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:33,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:36,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:36,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473021094] [2024-06-14 13:06:36,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473021094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:36,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:36,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:36,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311506723] [2024-06-14 13:06:36,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:36,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:36,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:36,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:36,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:36,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:06:36,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 312 transitions, 5201 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:36,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:36,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:06:36,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:38,373 INFO L124 PetriNetUnfolderBase]: 2473/4394 cut-off events. [2024-06-14 13:06:38,373 INFO L125 PetriNetUnfolderBase]: For 141424/141424 co-relation queries the response was YES. [2024-06-14 13:06:38,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29596 conditions, 4394 events. 2473/4394 cut-off events. For 141424/141424 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 31524 event pairs, 738 based on Foata normal form. 9/4393 useless extension candidates. Maximal degree in co-relation 29491. Up to 3605 conditions per place. [2024-06-14 13:06:38,423 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 261 selfloop transitions, 70 changer transitions 0/337 dead transitions. [2024-06-14 13:06:38,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 337 transitions, 6017 flow [2024-06-14 13:06:38,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:06:38,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:06:38,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-14 13:06:38,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 13:06:38,424 INFO L175 Difference]: Start difference. First operand has 235 places, 312 transitions, 5201 flow. Second operand 10 states and 165 transitions. [2024-06-14 13:06:38,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 337 transitions, 6017 flow [2024-06-14 13:06:38,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 337 transitions, 5762 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-14 13:06:38,753 INFO L231 Difference]: Finished difference. Result has 239 places, 313 transitions, 5128 flow [2024-06-14 13:06:38,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4946, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5128, PETRI_PLACES=239, PETRI_TRANSITIONS=313} [2024-06-14 13:06:38,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-14 13:06:38,754 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 313 transitions, 5128 flow [2024-06-14 13:06:38,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:38,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:38,754 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, 1, 1] [2024-06-14 13:06:38,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:06:38,754 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)] === [2024-06-14 13:06:38,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:38,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1770192355, now seen corresponding path program 12 times [2024-06-14 13:06:38,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:38,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687690554] [2024-06-14 13:06:38,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:38,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:41,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:41,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:41,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687690554] [2024-06-14 13:06:41,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687690554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:41,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:41,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:41,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316871077] [2024-06-14 13:06:41,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:41,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:41,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:41,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:41,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:41,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:06:41,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 313 transitions, 5128 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:41,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:41,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:06:41,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:43,578 INFO L124 PetriNetUnfolderBase]: 2589/4620 cut-off events. [2024-06-14 13:06:43,578 INFO L125 PetriNetUnfolderBase]: For 167254/167254 co-relation queries the response was YES. [2024-06-14 13:06:43,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30707 conditions, 4620 events. 2589/4620 cut-off events. For 167254/167254 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 33697 event pairs, 410 based on Foata normal form. 24/4642 useless extension candidates. Maximal degree in co-relation 30601. Up to 2426 conditions per place. [2024-06-14 13:06:43,624 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 223 selfloop transitions, 115 changer transitions 6/350 dead transitions. [2024-06-14 13:06:43,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 350 transitions, 6139 flow [2024-06-14 13:06:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:06:43,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:06:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:06:43,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-14 13:06:43,625 INFO L175 Difference]: Start difference. First operand has 239 places, 313 transitions, 5128 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:06:43,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 350 transitions, 6139 flow [2024-06-14 13:06:43,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 350 transitions, 5975 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 13:06:43,962 INFO L231 Difference]: Finished difference. Result has 241 places, 315 transitions, 5314 flow [2024-06-14 13:06:43,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4964, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5314, PETRI_PLACES=241, PETRI_TRANSITIONS=315} [2024-06-14 13:06:43,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-14 13:06:43,962 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 315 transitions, 5314 flow [2024-06-14 13:06:43,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:43,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:43,962 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, 1] [2024-06-14 13:06:43,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:06:43,963 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)] === [2024-06-14 13:06:43,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:43,963 INFO L85 PathProgramCache]: Analyzing trace with hash 482890964, now seen corresponding path program 3 times [2024-06-14 13:06:43,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:43,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710120806] [2024-06-14 13:06:43,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:43,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:46,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:46,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:46,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710120806] [2024-06-14 13:06:46,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710120806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:46,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:46,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:46,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423149760] [2024-06-14 13:06:46,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:46,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:46,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:46,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:46,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:47,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:06:47,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 315 transitions, 5314 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:47,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:47,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:06:47,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:48,704 INFO L124 PetriNetUnfolderBase]: 2561/4591 cut-off events. [2024-06-14 13:06:48,704 INFO L125 PetriNetUnfolderBase]: For 156596/156611 co-relation queries the response was YES. [2024-06-14 13:06:48,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30736 conditions, 4591 events. 2561/4591 cut-off events. For 156596/156611 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 33688 event pairs, 446 based on Foata normal form. 7/4578 useless extension candidates. Maximal degree in co-relation 30628. Up to 2724 conditions per place. [2024-06-14 13:06:48,746 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 203 selfloop transitions, 126 changer transitions 0/335 dead transitions. [2024-06-14 13:06:48,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 335 transitions, 6077 flow [2024-06-14 13:06:48,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:06:48,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:06:48,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:06:48,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-14 13:06:48,748 INFO L175 Difference]: Start difference. First operand has 241 places, 315 transitions, 5314 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:06:48,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 335 transitions, 6077 flow [2024-06-14 13:06:49,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 335 transitions, 5845 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:06:49,044 INFO L231 Difference]: Finished difference. Result has 243 places, 317 transitions, 5407 flow [2024-06-14 13:06:49,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5082, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5407, PETRI_PLACES=243, PETRI_TRANSITIONS=317} [2024-06-14 13:06:49,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-14 13:06:49,045 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 317 transitions, 5407 flow [2024-06-14 13:06:49,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:49,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:49,045 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, 1] [2024-06-14 13:06:49,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:06:49,045 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)] === [2024-06-14 13:06:49,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:49,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1663667696, now seen corresponding path program 4 times [2024-06-14 13:06:49,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:49,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715851286] [2024-06-14 13:06:49,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:49,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:52,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:52,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715851286] [2024-06-14 13:06:52,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715851286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:52,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:52,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:52,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535546674] [2024-06-14 13:06:52,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:52,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:52,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:52,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:52,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:52,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:06:52,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 317 transitions, 5407 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:52,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:52,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:06:52,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:53,531 INFO L124 PetriNetUnfolderBase]: 2576/4617 cut-off events. [2024-06-14 13:06:53,531 INFO L125 PetriNetUnfolderBase]: For 158431/158431 co-relation queries the response was YES. [2024-06-14 13:06:53,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30901 conditions, 4617 events. 2576/4617 cut-off events. For 158431/158431 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 33953 event pairs, 748 based on Foata normal form. 8/4623 useless extension candidates. Maximal degree in co-relation 30792. Up to 4028 conditions per place. [2024-06-14 13:06:53,577 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 303 selfloop transitions, 25 changer transitions 1/335 dead transitions. [2024-06-14 13:06:53,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 335 transitions, 6179 flow [2024-06-14 13:06:53,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:06:53,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:06:53,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:06:53,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 13:06:53,578 INFO L175 Difference]: Start difference. First operand has 243 places, 317 transitions, 5407 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:06:53,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 335 transitions, 6179 flow [2024-06-14 13:06:53,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 335 transitions, 5879 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 13:06:53,975 INFO L231 Difference]: Finished difference. Result has 245 places, 318 transitions, 5186 flow [2024-06-14 13:06:53,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5107, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5186, PETRI_PLACES=245, PETRI_TRANSITIONS=318} [2024-06-14 13:06:53,975 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-14 13:06:53,975 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 318 transitions, 5186 flow [2024-06-14 13:06:53,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:53,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:53,976 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, 1] [2024-06-14 13:06:53,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:06:53,976 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)] === [2024-06-14 13:06:53,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:53,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1170425599, now seen corresponding path program 13 times [2024-06-14 13:06:53,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:53,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431704664] [2024-06-14 13:06:53,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:53,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:57,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:57,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431704664] [2024-06-14 13:06:57,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431704664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:57,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:57,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:57,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305365067] [2024-06-14 13:06:57,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:57,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:57,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:57,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:57,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:57,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:06:57,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 318 transitions, 5186 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:57,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:57,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:06:57,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:59,404 INFO L124 PetriNetUnfolderBase]: 2596/4660 cut-off events. [2024-06-14 13:06:59,404 INFO L125 PetriNetUnfolderBase]: For 161726/161744 co-relation queries the response was YES. [2024-06-14 13:06:59,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30660 conditions, 4660 events. 2596/4660 cut-off events. For 161726/161744 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 34311 event pairs, 825 based on Foata normal form. 11/4660 useless extension candidates. Maximal degree in co-relation 30550. Up to 3915 conditions per place. [2024-06-14 13:06:59,450 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 257 selfloop transitions, 71 changer transitions 0/334 dead transitions. [2024-06-14 13:06:59,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 334 transitions, 5916 flow [2024-06-14 13:06:59,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:06:59,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:06:59,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:06:59,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-14 13:06:59,452 INFO L175 Difference]: Start difference. First operand has 245 places, 318 transitions, 5186 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:06:59,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 334 transitions, 5916 flow [2024-06-14 13:06:59,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 334 transitions, 5857 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:06:59,904 INFO L231 Difference]: Finished difference. Result has 247 places, 319 transitions, 5298 flow [2024-06-14 13:06:59,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5127, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5298, PETRI_PLACES=247, PETRI_TRANSITIONS=319} [2024-06-14 13:06:59,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-14 13:06:59,904 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 319 transitions, 5298 flow [2024-06-14 13:06:59,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:59,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:59,905 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, 1] [2024-06-14 13:06:59,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:06:59,905 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)] === [2024-06-14 13:06:59,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:59,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1170573469, now seen corresponding path program 14 times [2024-06-14 13:06:59,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:59,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924335634] [2024-06-14 13:06:59,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:59,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:03,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:03,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924335634] [2024-06-14 13:07:03,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924335634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:03,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:03,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:03,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661972474] [2024-06-14 13:07:03,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:03,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:03,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:03,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:03,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:03,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:07:03,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 319 transitions, 5298 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:03,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:03,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:07:03,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:05,508 INFO L124 PetriNetUnfolderBase]: 2700/4858 cut-off events. [2024-06-14 13:07:05,508 INFO L125 PetriNetUnfolderBase]: For 165641/165659 co-relation queries the response was YES. [2024-06-14 13:07:05,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31816 conditions, 4858 events. 2700/4858 cut-off events. For 165641/165659 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 36139 event pairs, 885 based on Foata normal form. 11/4858 useless extension candidates. Maximal degree in co-relation 31706. Up to 3775 conditions per place. [2024-06-14 13:07:05,558 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 246 selfloop transitions, 89 changer transitions 5/346 dead transitions. [2024-06-14 13:07:05,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 346 transitions, 6236 flow [2024-06-14 13:07:05,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:05,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:07:05,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-14 13:07:05,559 INFO L175 Difference]: Start difference. First operand has 247 places, 319 transitions, 5298 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:07:05,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 346 transitions, 6236 flow [2024-06-14 13:07:05,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 346 transitions, 6079 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:07:05,914 INFO L231 Difference]: Finished difference. Result has 250 places, 323 transitions, 5415 flow [2024-06-14 13:07:05,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5141, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5415, PETRI_PLACES=250, PETRI_TRANSITIONS=323} [2024-06-14 13:07:05,915 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-14 13:07:05,915 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 323 transitions, 5415 flow [2024-06-14 13:07:05,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:05,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:05,915 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, 1] [2024-06-14 13:07:05,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:07:05,915 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)] === [2024-06-14 13:07:05,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:05,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1837381988, now seen corresponding path program 5 times [2024-06-14 13:07:05,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:05,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970941368] [2024-06-14 13:07:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:05,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:05,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:10,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:10,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970941368] [2024-06-14 13:07:10,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970941368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:10,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:10,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:07:10,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656312112] [2024-06-14 13:07:10,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:10,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:07:10,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:10,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:07:10,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:07:10,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:07:10,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 323 transitions, 5415 flow. Second operand has 11 states, 11 states have (on average 10.727272727272727) internal successors, (118), 11 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:10,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:10,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:07:10,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:11,864 INFO L124 PetriNetUnfolderBase]: 2725/4919 cut-off events. [2024-06-14 13:07:11,864 INFO L125 PetriNetUnfolderBase]: For 178328/178328 co-relation queries the response was YES. [2024-06-14 13:07:11,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32475 conditions, 4919 events. 2725/4919 cut-off events. For 178328/178328 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 37054 event pairs, 977 based on Foata normal form. 9/4918 useless extension candidates. Maximal degree in co-relation 32363. Up to 4305 conditions per place. [2024-06-14 13:07:11,917 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 315 selfloop transitions, 20 changer transitions 1/342 dead transitions. [2024-06-14 13:07:11,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 342 transitions, 6207 flow [2024-06-14 13:07:11,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:11,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:11,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-14 13:07:11,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-14 13:07:11,919 INFO L175 Difference]: Start difference. First operand has 250 places, 323 transitions, 5415 flow. Second operand 9 states and 139 transitions. [2024-06-14 13:07:11,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 342 transitions, 6207 flow [2024-06-14 13:07:12,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 342 transitions, 6073 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:12,370 INFO L231 Difference]: Finished difference. Result has 254 places, 324 transitions, 5365 flow [2024-06-14 13:07:12,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5281, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5365, PETRI_PLACES=254, PETRI_TRANSITIONS=324} [2024-06-14 13:07:12,370 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-14 13:07:12,371 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 324 transitions, 5365 flow [2024-06-14 13:07:12,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.727272727272727) internal successors, (118), 11 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:12,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:12,371 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, 1] [2024-06-14 13:07:12,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:07:12,371 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)] === [2024-06-14 13:07:12,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:12,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1170425444, now seen corresponding path program 6 times [2024-06-14 13:07:12,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:12,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746268208] [2024-06-14 13:07:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:12,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:15,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:15,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746268208] [2024-06-14 13:07:15,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746268208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:15,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:15,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:15,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517412199] [2024-06-14 13:07:15,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:15,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:15,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:15,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:15,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:15,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:07:15,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 324 transitions, 5365 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:15,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:15,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:07:15,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:17,533 INFO L124 PetriNetUnfolderBase]: 2812/5062 cut-off events. [2024-06-14 13:07:17,534 INFO L125 PetriNetUnfolderBase]: For 198463/198481 co-relation queries the response was YES. [2024-06-14 13:07:17,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34127 conditions, 5062 events. 2812/5062 cut-off events. For 198463/198481 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 38077 event pairs, 919 based on Foata normal form. 14/5057 useless extension candidates. Maximal degree in co-relation 34013. Up to 4194 conditions per place. [2024-06-14 13:07:17,583 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 274 selfloop transitions, 76 changer transitions 0/356 dead transitions. [2024-06-14 13:07:17,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 356 transitions, 6443 flow [2024-06-14 13:07:17,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:07:17,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:07:17,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-14 13:07:17,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 13:07:17,584 INFO L175 Difference]: Start difference. First operand has 254 places, 324 transitions, 5365 flow. Second operand 11 states and 176 transitions. [2024-06-14 13:07:17,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 356 transitions, 6443 flow [2024-06-14 13:07:17,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 356 transitions, 6373 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 13:07:17,999 INFO L231 Difference]: Finished difference. Result has 259 places, 330 transitions, 5613 flow [2024-06-14 13:07:18,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5295, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5613, PETRI_PLACES=259, PETRI_TRANSITIONS=330} [2024-06-14 13:07:18,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-14 13:07:18,000 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 330 transitions, 5613 flow [2024-06-14 13:07:18,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:18,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:18,000 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, 1] [2024-06-14 13:07:18,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:07:18,001 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)] === [2024-06-14 13:07:18,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:18,001 INFO L85 PathProgramCache]: Analyzing trace with hash 249000138, now seen corresponding path program 7 times [2024-06-14 13:07:18,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:18,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282787679] [2024-06-14 13:07:18,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:18,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:20,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:20,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282787679] [2024-06-14 13:07:20,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282787679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:20,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:20,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:20,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927829848] [2024-06-14 13:07:20,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:20,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:20,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:20,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:20,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:20,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:07:20,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 330 transitions, 5613 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:20,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:20,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:07:20,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:22,829 INFO L124 PetriNetUnfolderBase]: 2804/5066 cut-off events. [2024-06-14 13:07:22,830 INFO L125 PetriNetUnfolderBase]: For 196142/196160 co-relation queries the response was YES. [2024-06-14 13:07:22,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33927 conditions, 5066 events. 2804/5066 cut-off events. For 196142/196160 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 38226 event pairs, 755 based on Foata normal form. 14/5069 useless extension candidates. Maximal degree in co-relation 33811. Up to 3531 conditions per place. [2024-06-14 13:07:22,887 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 168 selfloop transitions, 188 changer transitions 0/362 dead transitions. [2024-06-14 13:07:22,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 362 transitions, 6706 flow [2024-06-14 13:07:22,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:07:22,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:07:22,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 197 transitions. [2024-06-14 13:07:22,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39087301587301587 [2024-06-14 13:07:22,888 INFO L175 Difference]: Start difference. First operand has 259 places, 330 transitions, 5613 flow. Second operand 12 states and 197 transitions. [2024-06-14 13:07:22,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 362 transitions, 6706 flow [2024-06-14 13:07:23,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 362 transitions, 6514 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:23,358 INFO L231 Difference]: Finished difference. Result has 268 places, 336 transitions, 6064 flow [2024-06-14 13:07:23,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5421, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6064, PETRI_PLACES=268, PETRI_TRANSITIONS=336} [2024-06-14 13:07:23,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-14 13:07:23,359 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 336 transitions, 6064 flow [2024-06-14 13:07:23,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:23,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:23,359 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, 1] [2024-06-14 13:07:23,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:07:23,360 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:23,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:23,360 INFO L85 PathProgramCache]: Analyzing trace with hash 25689960, now seen corresponding path program 8 times [2024-06-14 13:07:23,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:23,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347518929] [2024-06-14 13:07:23,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:23,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:25,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:25,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347518929] [2024-06-14 13:07:25,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347518929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:25,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:25,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:25,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655060320] [2024-06-14 13:07:25,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:25,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:25,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:25,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:25,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:26,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:07:26,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 336 transitions, 6064 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:26,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:26,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:07:26,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:27,815 INFO L124 PetriNetUnfolderBase]: 2829/5089 cut-off events. [2024-06-14 13:07:27,815 INFO L125 PetriNetUnfolderBase]: For 205458/205476 co-relation queries the response was YES. [2024-06-14 13:07:27,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35376 conditions, 5089 events. 2829/5089 cut-off events. For 205458/205476 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 38356 event pairs, 925 based on Foata normal form. 14/5092 useless extension candidates. Maximal degree in co-relation 35256. Up to 4292 conditions per place. [2024-06-14 13:07:27,875 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 275 selfloop transitions, 70 changer transitions 0/351 dead transitions. [2024-06-14 13:07:27,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 351 transitions, 6854 flow [2024-06-14 13:07:27,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:27,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:27,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 13:07:27,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-14 13:07:27,877 INFO L175 Difference]: Start difference. First operand has 268 places, 336 transitions, 6064 flow. Second operand 9 states and 145 transitions. [2024-06-14 13:07:27,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 351 transitions, 6854 flow [2024-06-14 13:07:28,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 351 transitions, 6639 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-06-14 13:07:28,424 INFO L231 Difference]: Finished difference. Result has 266 places, 337 transitions, 6040 flow [2024-06-14 13:07:28,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5849, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6040, PETRI_PLACES=266, PETRI_TRANSITIONS=337} [2024-06-14 13:07:28,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-14 13:07:28,425 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 337 transitions, 6040 flow [2024-06-14 13:07:28,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:28,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:28,425 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, 1] [2024-06-14 13:07:28,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:07:28,425 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:28,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:28,425 INFO L85 PathProgramCache]: Analyzing trace with hash 25684225, now seen corresponding path program 15 times [2024-06-14 13:07:28,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:28,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114460169] [2024-06-14 13:07:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:28,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:31,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:31,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114460169] [2024-06-14 13:07:31,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114460169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:31,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:31,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:31,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561714058] [2024-06-14 13:07:31,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:31,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:31,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:31,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:31,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:31,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:07:31,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 337 transitions, 6040 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:31,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:31,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:07:31,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:33,423 INFO L124 PetriNetUnfolderBase]: 2816/5068 cut-off events. [2024-06-14 13:07:33,423 INFO L125 PetriNetUnfolderBase]: For 198280/198298 co-relation queries the response was YES. [2024-06-14 13:07:33,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34864 conditions, 5068 events. 2816/5068 cut-off events. For 198280/198298 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 38194 event pairs, 917 based on Foata normal form. 11/5068 useless extension candidates. Maximal degree in co-relation 34745. Up to 4273 conditions per place. [2024-06-14 13:07:33,476 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 273 selfloop transitions, 73 changer transitions 0/352 dead transitions. [2024-06-14 13:07:33,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 352 transitions, 6787 flow [2024-06-14 13:07:33,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:33,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:33,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 13:07:33,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-14 13:07:33,477 INFO L175 Difference]: Start difference. First operand has 266 places, 337 transitions, 6040 flow. Second operand 9 states and 145 transitions. [2024-06-14 13:07:33,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 352 transitions, 6787 flow [2024-06-14 13:07:33,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 352 transitions, 6492 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-14 13:07:33,995 INFO L231 Difference]: Finished difference. Result has 265 places, 337 transitions, 5896 flow [2024-06-14 13:07:33,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5745, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5896, PETRI_PLACES=265, PETRI_TRANSITIONS=337} [2024-06-14 13:07:33,996 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-14 13:07:33,996 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 337 transitions, 5896 flow [2024-06-14 13:07:33,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:33,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:33,996 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, 1] [2024-06-14 13:07:33,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:07:33,997 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:33,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:33,997 INFO L85 PathProgramCache]: Analyzing trace with hash 25684380, now seen corresponding path program 9 times [2024-06-14 13:07:33,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:33,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395306909] [2024-06-14 13:07:33,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:33,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:36,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:36,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:36,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395306909] [2024-06-14 13:07:36,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395306909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:36,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:36,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:36,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21862701] [2024-06-14 13:07:36,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:36,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:36,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:36,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:36,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:36,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:07:36,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 337 transitions, 5896 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:36,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:36,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:07:36,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:38,738 INFO L124 PetriNetUnfolderBase]: 2828/5103 cut-off events. [2024-06-14 13:07:38,738 INFO L125 PetriNetUnfolderBase]: For 201967/201985 co-relation queries the response was YES. [2024-06-14 13:07:38,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34646 conditions, 5103 events. 2828/5103 cut-off events. For 201967/201985 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 38550 event pairs, 914 based on Foata normal form. 14/5106 useless extension candidates. Maximal degree in co-relation 34527. Up to 4246 conditions per place. [2024-06-14 13:07:38,792 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 278 selfloop transitions, 76 changer transitions 0/360 dead transitions. [2024-06-14 13:07:38,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 360 transitions, 6781 flow [2024-06-14 13:07:38,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:07:38,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:07:38,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-14 13:07:38,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-14 13:07:38,794 INFO L175 Difference]: Start difference. First operand has 265 places, 337 transitions, 5896 flow. Second operand 10 states and 161 transitions. [2024-06-14 13:07:38,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 360 transitions, 6781 flow [2024-06-14 13:07:39,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 360 transitions, 6610 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 13:07:39,334 INFO L231 Difference]: Finished difference. Result has 267 places, 338 transitions, 5931 flow [2024-06-14 13:07:39,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5725, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5931, PETRI_PLACES=267, PETRI_TRANSITIONS=338} [2024-06-14 13:07:39,335 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-14 13:07:39,335 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 338 transitions, 5931 flow [2024-06-14 13:07:39,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:39,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:39,335 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, 1, 1] [2024-06-14 13:07:39,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:07:39,335 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:39,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:39,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1897232876, now seen corresponding path program 1 times [2024-06-14 13:07:39,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:39,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960263619] [2024-06-14 13:07:39,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:39,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:42,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:42,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960263619] [2024-06-14 13:07:42,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960263619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:42,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:42,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:42,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102407347] [2024-06-14 13:07:42,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:42,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:42,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:42,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:42,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:42,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:07:42,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 338 transitions, 5931 flow. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:42,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:42,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:07:42,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:44,470 INFO L124 PetriNetUnfolderBase]: 2807/5075 cut-off events. [2024-06-14 13:07:44,471 INFO L125 PetriNetUnfolderBase]: For 195394/195402 co-relation queries the response was YES. [2024-06-14 13:07:44,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34314 conditions, 5075 events. 2807/5075 cut-off events. For 195394/195402 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 38373 event pairs, 472 based on Foata normal form. 14/5087 useless extension candidates. Maximal degree in co-relation 34194. Up to 3549 conditions per place. [2024-06-14 13:07:44,519 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 297 selfloop transitions, 55 changer transitions 14/372 dead transitions. [2024-06-14 13:07:44,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 372 transitions, 6890 flow [2024-06-14 13:07:44,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:44,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 13:07:44,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-14 13:07:44,521 INFO L175 Difference]: Start difference. First operand has 267 places, 338 transitions, 5931 flow. Second operand 9 states and 158 transitions. [2024-06-14 13:07:44,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 372 transitions, 6890 flow [2024-06-14 13:07:45,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 372 transitions, 6688 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-14 13:07:45,088 INFO L231 Difference]: Finished difference. Result has 268 places, 331 transitions, 5675 flow [2024-06-14 13:07:45,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5729, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5675, PETRI_PLACES=268, PETRI_TRANSITIONS=331} [2024-06-14 13:07:45,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-14 13:07:45,089 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 331 transitions, 5675 flow [2024-06-14 13:07:45,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:45,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:45,089 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, 1, 1] [2024-06-14 13:07:45,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:07:45,089 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:45,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:45,089 INFO L85 PathProgramCache]: Analyzing trace with hash -845564359, now seen corresponding path program 1 times [2024-06-14 13:07:45,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:45,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265126578] [2024-06-14 13:07:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:45,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:47,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:47,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265126578] [2024-06-14 13:07:47,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265126578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:47,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:47,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:47,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658742480] [2024-06-14 13:07:47,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:47,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:47,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:47,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:47,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:47,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:07:47,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 331 transitions, 5675 flow. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:47,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:47,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:07:47,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:49,977 INFO L124 PetriNetUnfolderBase]: 2681/4835 cut-off events. [2024-06-14 13:07:49,977 INFO L125 PetriNetUnfolderBase]: For 189842/189850 co-relation queries the response was YES. [2024-06-14 13:07:50,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32151 conditions, 4835 events. 2681/4835 cut-off events. For 189842/189850 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 36217 event pairs, 605 based on Foata normal form. 20/4845 useless extension candidates. Maximal degree in co-relation 32030. Up to 3893 conditions per place. [2024-06-14 13:07:50,032 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 299 selfloop transitions, 48 changer transitions 7/360 dead transitions. [2024-06-14 13:07:50,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 360 transitions, 6524 flow [2024-06-14 13:07:50,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:50,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:50,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 13:07:50,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-14 13:07:50,033 INFO L175 Difference]: Start difference. First operand has 268 places, 331 transitions, 5675 flow. Second operand 9 states and 152 transitions. [2024-06-14 13:07:50,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 360 transitions, 6524 flow [2024-06-14 13:07:50,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 360 transitions, 6348 flow, removed 19 selfloop flow, removed 11 redundant places. [2024-06-14 13:07:50,533 INFO L231 Difference]: Finished difference. Result has 263 places, 327 transitions, 5544 flow [2024-06-14 13:07:50,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5504, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5544, PETRI_PLACES=263, PETRI_TRANSITIONS=327} [2024-06-14 13:07:50,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-14 13:07:50,534 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 327 transitions, 5544 flow [2024-06-14 13:07:50,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:50,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:50,534 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, 1, 1] [2024-06-14 13:07:50,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:07:50,534 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:50,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:50,534 INFO L85 PathProgramCache]: Analyzing trace with hash 567753355, now seen corresponding path program 2 times [2024-06-14 13:07:50,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:50,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084349157] [2024-06-14 13:07:50,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:50,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:54,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:54,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084349157] [2024-06-14 13:07:54,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084349157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:54,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:54,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:54,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158377443] [2024-06-14 13:07:54,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:54,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:54,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:54,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:54,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:54,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:07:54,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 327 transitions, 5544 flow. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:54,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:54,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:07:54,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:55,958 INFO L124 PetriNetUnfolderBase]: 2629/4737 cut-off events. [2024-06-14 13:07:55,958 INFO L125 PetriNetUnfolderBase]: For 176349/176370 co-relation queries the response was YES. [2024-06-14 13:07:56,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31641 conditions, 4737 events. 2629/4737 cut-off events. For 176349/176370 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 35268 event pairs, 579 based on Foata normal form. 20/4751 useless extension candidates. Maximal degree in co-relation 31520. Up to 3821 conditions per place. [2024-06-14 13:07:56,018 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 299 selfloop transitions, 46 changer transitions 0/351 dead transitions. [2024-06-14 13:07:56,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 351 transitions, 6380 flow [2024-06-14 13:07:56,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:56,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:56,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 13:07:56,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 13:07:56,019 INFO L175 Difference]: Start difference. First operand has 263 places, 327 transitions, 5544 flow. Second operand 8 states and 136 transitions. [2024-06-14 13:07:56,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 351 transitions, 6380 flow [2024-06-14 13:07:56,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 351 transitions, 6260 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 13:07:56,504 INFO L231 Difference]: Finished difference. Result has 261 places, 328 transitions, 5570 flow [2024-06-14 13:07:56,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5428, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5570, PETRI_PLACES=261, PETRI_TRANSITIONS=328} [2024-06-14 13:07:56,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-14 13:07:56,504 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 328 transitions, 5570 flow [2024-06-14 13:07:56,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:56,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:56,505 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, 1, 1] [2024-06-14 13:07:56,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:07:56,505 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:56,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:56,505 INFO L85 PathProgramCache]: Analyzing trace with hash 567753200, now seen corresponding path program 1 times [2024-06-14 13:07:56,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:56,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027456770] [2024-06-14 13:07:56,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:56,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:00,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:00,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027456770] [2024-06-14 13:08:00,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027456770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:00,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:00,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:08:00,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000770575] [2024-06-14 13:08:00,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:00,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:08:00,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:00,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:08:00,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:08:00,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:08:00,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 328 transitions, 5570 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:00,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:00,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:08:00,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:01,839 INFO L124 PetriNetUnfolderBase]: 2641/4757 cut-off events. [2024-06-14 13:08:01,839 INFO L125 PetriNetUnfolderBase]: For 166876/166876 co-relation queries the response was YES. [2024-06-14 13:08:01,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31487 conditions, 4757 events. 2641/4757 cut-off events. For 166876/166876 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 35487 event pairs, 739 based on Foata normal form. 4/4759 useless extension candidates. Maximal degree in co-relation 31366. Up to 4183 conditions per place. [2024-06-14 13:08:01,892 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 319 selfloop transitions, 18 changer transitions 0/343 dead transitions. [2024-06-14 13:08:01,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 343 transitions, 6302 flow [2024-06-14 13:08:01,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:01,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:01,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 13:08:01,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-14 13:08:01,894 INFO L175 Difference]: Start difference. First operand has 261 places, 328 transitions, 5570 flow. Second operand 8 states and 124 transitions. [2024-06-14 13:08:01,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 343 transitions, 6302 flow [2024-06-14 13:08:02,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 343 transitions, 6172 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:02,428 INFO L231 Difference]: Finished difference. Result has 263 places, 329 transitions, 5508 flow [2024-06-14 13:08:02,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5440, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5508, PETRI_PLACES=263, PETRI_TRANSITIONS=329} [2024-06-14 13:08:02,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-14 13:08:02,428 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 329 transitions, 5508 flow [2024-06-14 13:08:02,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:02,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:02,429 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, 1, 1] [2024-06-14 13:08:02,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:08:02,429 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:02,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:02,430 INFO L85 PathProgramCache]: Analyzing trace with hash 567662990, now seen corresponding path program 2 times [2024-06-14 13:08:02,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:02,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763022881] [2024-06-14 13:08:02,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:02,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:05,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:05,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763022881] [2024-06-14 13:08:05,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763022881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:05,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:05,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:05,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922297835] [2024-06-14 13:08:05,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:05,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:05,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:05,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:05,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:05,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:08:05,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 329 transitions, 5508 flow. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:05,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:05,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:08:05,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:07,278 INFO L124 PetriNetUnfolderBase]: 2661/4815 cut-off events. [2024-06-14 13:08:07,279 INFO L125 PetriNetUnfolderBase]: For 176138/176159 co-relation queries the response was YES. [2024-06-14 13:08:07,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31446 conditions, 4815 events. 2661/4815 cut-off events. For 176138/176159 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 36105 event pairs, 389 based on Foata normal form. 18/4827 useless extension candidates. Maximal degree in co-relation 31324. Up to 3425 conditions per place. [2024-06-14 13:08:07,330 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 283 selfloop transitions, 70 changer transitions 0/359 dead transitions. [2024-06-14 13:08:07,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 359 transitions, 6442 flow [2024-06-14 13:08:07,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:07,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:07,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 13:08:07,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 13:08:07,331 INFO L175 Difference]: Start difference. First operand has 263 places, 329 transitions, 5508 flow. Second operand 9 states and 153 transitions. [2024-06-14 13:08:07,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 359 transitions, 6442 flow [2024-06-14 13:08:07,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 359 transitions, 6384 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:07,819 INFO L231 Difference]: Finished difference. Result has 266 places, 331 transitions, 5652 flow [2024-06-14 13:08:07,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5450, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5652, PETRI_PLACES=266, PETRI_TRANSITIONS=331} [2024-06-14 13:08:07,820 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-14 13:08:07,820 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 331 transitions, 5652 flow [2024-06-14 13:08:07,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:07,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:07,820 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, 1, 1] [2024-06-14 13:08:07,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:08:07,821 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:07,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:07,821 INFO L85 PathProgramCache]: Analyzing trace with hash 349827230, now seen corresponding path program 3 times [2024-06-14 13:08:07,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:07,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97484891] [2024-06-14 13:08:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:07,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:11,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:11,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97484891] [2024-06-14 13:08:11,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97484891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:11,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:11,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:08:11,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730895652] [2024-06-14 13:08:11,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:11,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:08:11,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:11,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:08:11,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:08:11,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:08:11,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 331 transitions, 5652 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:11,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:11,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:08:11,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:13,259 INFO L124 PetriNetUnfolderBase]: 2637/4761 cut-off events. [2024-06-14 13:08:13,259 INFO L125 PetriNetUnfolderBase]: For 178424/178445 co-relation queries the response was YES. [2024-06-14 13:08:13,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31201 conditions, 4761 events. 2637/4761 cut-off events. For 178424/178445 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 35546 event pairs, 364 based on Foata normal form. 22/4777 useless extension candidates. Maximal degree in co-relation 31078. Up to 3529 conditions per place. [2024-06-14 13:08:13,312 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 280 selfloop transitions, 66 changer transitions 3/355 dead transitions. [2024-06-14 13:08:13,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 355 transitions, 6414 flow [2024-06-14 13:08:13,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:13,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:13,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:08:13,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-14 13:08:13,314 INFO L175 Difference]: Start difference. First operand has 266 places, 331 transitions, 5652 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:08:13,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 355 transitions, 6414 flow [2024-06-14 13:08:13,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 355 transitions, 6278 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:13,822 INFO L231 Difference]: Finished difference. Result has 270 places, 328 transitions, 5581 flow [2024-06-14 13:08:13,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5516, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5581, PETRI_PLACES=270, PETRI_TRANSITIONS=328} [2024-06-14 13:08:13,823 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-14 13:08:13,823 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 328 transitions, 5581 flow [2024-06-14 13:08:13,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:13,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:13,823 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, 1, 1] [2024-06-14 13:08:13,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:08:13,823 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:13,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:13,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1914532996, now seen corresponding path program 2 times [2024-06-14 13:08:13,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:13,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969855394] [2024-06-14 13:08:13,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:13,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:17,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:17,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969855394] [2024-06-14 13:08:17,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969855394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:17,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:17,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:08:17,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308832918] [2024-06-14 13:08:17,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:17,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:08:17,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:17,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:08:17,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:08:18,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:08:18,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 328 transitions, 5581 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:18,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:18,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:08:18,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:19,972 INFO L124 PetriNetUnfolderBase]: 2636/4754 cut-off events. [2024-06-14 13:08:19,972 INFO L125 PetriNetUnfolderBase]: For 193287/193295 co-relation queries the response was YES. [2024-06-14 13:08:20,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32051 conditions, 4754 events. 2636/4754 cut-off events. For 193287/193295 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 35467 event pairs, 310 based on Foata normal form. 14/4766 useless extension candidates. Maximal degree in co-relation 31926. Up to 2462 conditions per place. [2024-06-14 13:08:20,026 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 235 selfloop transitions, 139 changer transitions 2/382 dead transitions. [2024-06-14 13:08:20,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 382 transitions, 6799 flow [2024-06-14 13:08:20,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:08:20,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:08:20,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-14 13:08:20,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-14 13:08:20,027 INFO L175 Difference]: Start difference. First operand has 270 places, 328 transitions, 5581 flow. Second operand 10 states and 185 transitions. [2024-06-14 13:08:20,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 382 transitions, 6799 flow [2024-06-14 13:08:20,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 382 transitions, 6546 flow, removed 35 selfloop flow, removed 13 redundant places. [2024-06-14 13:08:20,551 INFO L231 Difference]: Finished difference. Result has 266 places, 331 transitions, 5787 flow [2024-06-14 13:08:20,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5338, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5787, PETRI_PLACES=266, PETRI_TRANSITIONS=331} [2024-06-14 13:08:20,551 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-14 13:08:20,551 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 331 transitions, 5787 flow [2024-06-14 13:08:20,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:20,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:20,552 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, 1, 1] [2024-06-14 13:08:20,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:08:20,552 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:20,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:20,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1078582162, now seen corresponding path program 3 times [2024-06-14 13:08:20,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:20,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311006219] [2024-06-14 13:08:20,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:20,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:23,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:23,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311006219] [2024-06-14 13:08:23,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311006219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:23,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:23,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:23,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249433531] [2024-06-14 13:08:23,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:23,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:23,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:23,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:23,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:23,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:08:23,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 331 transitions, 5787 flow. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:23,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:23,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:08:23,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:25,193 INFO L124 PetriNetUnfolderBase]: 2607/4681 cut-off events. [2024-06-14 13:08:25,193 INFO L125 PetriNetUnfolderBase]: For 187875/187875 co-relation queries the response was YES. [2024-06-14 13:08:25,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31443 conditions, 4681 events. 2607/4681 cut-off events. For 187875/187875 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 34527 event pairs, 398 based on Foata normal form. 10/4689 useless extension candidates. Maximal degree in co-relation 31320. Up to 2684 conditions per place. [2024-06-14 13:08:25,243 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 232 selfloop transitions, 95 changer transitions 23/356 dead transitions. [2024-06-14 13:08:25,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 356 transitions, 6579 flow [2024-06-14 13:08:25,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:25,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:25,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:08:25,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-14 13:08:25,245 INFO L175 Difference]: Start difference. First operand has 266 places, 331 transitions, 5787 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:08:25,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 356 transitions, 6579 flow [2024-06-14 13:08:25,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 356 transitions, 6307 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:25,792 INFO L231 Difference]: Finished difference. Result has 268 places, 313 transitions, 5373 flow [2024-06-14 13:08:25,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5515, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5373, PETRI_PLACES=268, PETRI_TRANSITIONS=313} [2024-06-14 13:08:25,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-14 13:08:25,792 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 313 transitions, 5373 flow [2024-06-14 13:08:25,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:25,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:25,792 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, 1, 1] [2024-06-14 13:08:25,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:08:25,793 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:25,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:25,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1532771860, now seen corresponding path program 1 times [2024-06-14 13:08:25,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:25,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925962165] [2024-06-14 13:08:25,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:25,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:29,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:29,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925962165] [2024-06-14 13:08:29,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925962165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:29,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:29,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:08:29,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043816496] [2024-06-14 13:08:29,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:29,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:08:29,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:29,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:08:29,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:08:29,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:08:29,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 313 transitions, 5373 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:29,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:29,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:08:29,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:31,219 INFO L124 PetriNetUnfolderBase]: 2479/4475 cut-off events. [2024-06-14 13:08:31,220 INFO L125 PetriNetUnfolderBase]: For 213907/213912 co-relation queries the response was YES. [2024-06-14 13:08:31,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30469 conditions, 4475 events. 2479/4475 cut-off events. For 213907/213912 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 32950 event pairs, 477 based on Foata normal form. 23/4496 useless extension candidates. Maximal degree in co-relation 30344. Up to 2110 conditions per place. [2024-06-14 13:08:31,271 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 229 selfloop transitions, 134 changer transitions 16/385 dead transitions. [2024-06-14 13:08:31,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 385 transitions, 6723 flow [2024-06-14 13:08:31,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 13:08:31,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 13:08:31,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 267 transitions. [2024-06-14 13:08:31,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-14 13:08:31,272 INFO L175 Difference]: Start difference. First operand has 268 places, 313 transitions, 5373 flow. Second operand 15 states and 267 transitions. [2024-06-14 13:08:31,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 385 transitions, 6723 flow [2024-06-14 13:08:31,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 385 transitions, 6473 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-14 13:08:31,854 INFO L231 Difference]: Finished difference. Result has 276 places, 316 transitions, 5603 flow [2024-06-14 13:08:31,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5141, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5603, PETRI_PLACES=276, PETRI_TRANSITIONS=316} [2024-06-14 13:08:31,855 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-14 13:08:31,855 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 316 transitions, 5603 flow [2024-06-14 13:08:31,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:31,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:31,855 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, 1, 1] [2024-06-14 13:08:31,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:08:31,855 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:31,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:31,855 INFO L85 PathProgramCache]: Analyzing trace with hash -800891036, now seen corresponding path program 2 times [2024-06-14 13:08:31,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:31,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670779967] [2024-06-14 13:08:31,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:31,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:35,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:35,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670779967] [2024-06-14 13:08:35,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670779967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:35,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:35,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:08:35,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797217618] [2024-06-14 13:08:35,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:35,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:08:35,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:35,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:08:35,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:08:35,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:08:35,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 316 transitions, 5603 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:35,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:35,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:08:35,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:37,402 INFO L124 PetriNetUnfolderBase]: 2383/4325 cut-off events. [2024-06-14 13:08:37,402 INFO L125 PetriNetUnfolderBase]: For 216136/216141 co-relation queries the response was YES. [2024-06-14 13:08:37,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30334 conditions, 4325 events. 2383/4325 cut-off events. For 216136/216141 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 31852 event pairs, 289 based on Foata normal form. 23/4346 useless extension candidates. Maximal degree in co-relation 30206. Up to 2087 conditions per place. [2024-06-14 13:08:37,443 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 204 selfloop transitions, 122 changer transitions 35/367 dead transitions. [2024-06-14 13:08:37,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 367 transitions, 6662 flow [2024-06-14 13:08:37,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:08:37,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:08:37,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-14 13:08:37,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-06-14 13:08:37,444 INFO L175 Difference]: Start difference. First operand has 276 places, 316 transitions, 5603 flow. Second operand 11 states and 195 transitions. [2024-06-14 13:08:37,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 367 transitions, 6662 flow [2024-06-14 13:08:38,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 367 transitions, 6493 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-14 13:08:38,018 INFO L231 Difference]: Finished difference. Result has 276 places, 297 transitions, 5291 flow [2024-06-14 13:08:38,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5438, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5291, PETRI_PLACES=276, PETRI_TRANSITIONS=297} [2024-06-14 13:08:38,019 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-14 13:08:38,019 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 297 transitions, 5291 flow [2024-06-14 13:08:38,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:38,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:38,019 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, 1, 1] [2024-06-14 13:08:38,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:08:38,020 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:38,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:38,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1700882893, now seen corresponding path program 3 times [2024-06-14 13:08:38,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:38,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450639437] [2024-06-14 13:08:38,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:38,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:41,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:41,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450639437] [2024-06-14 13:08:41,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450639437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:41,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:41,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:08:41,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718262991] [2024-06-14 13:08:41,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:41,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:08:41,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:41,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:08:41,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:08:41,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:08:41,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 297 transitions, 5291 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:41,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:41,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:08:41,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:43,539 INFO L124 PetriNetUnfolderBase]: 2175/3939 cut-off events. [2024-06-14 13:08:43,540 INFO L125 PetriNetUnfolderBase]: For 184233/184238 co-relation queries the response was YES. [2024-06-14 13:08:43,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27902 conditions, 3939 events. 2175/3939 cut-off events. For 184233/184238 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 28525 event pairs, 429 based on Foata normal form. 11/3948 useless extension candidates. Maximal degree in co-relation 27790. Up to 2688 conditions per place. [2024-06-14 13:08:43,585 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 180 selfloop transitions, 161 changer transitions 0/347 dead transitions. [2024-06-14 13:08:43,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 347 transitions, 6370 flow [2024-06-14 13:08:43,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:08:43,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:08:43,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 204 transitions. [2024-06-14 13:08:43,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 13:08:43,586 INFO L175 Difference]: Start difference. First operand has 276 places, 297 transitions, 5291 flow. Second operand 12 states and 204 transitions. [2024-06-14 13:08:43,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 347 transitions, 6370 flow [2024-06-14 13:08:44,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 347 transitions, 6027 flow, removed 14 selfloop flow, removed 14 redundant places. [2024-06-14 13:08:44,060 INFO L231 Difference]: Finished difference. Result has 269 places, 309 transitions, 5526 flow [2024-06-14 13:08:44,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4957, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5526, PETRI_PLACES=269, PETRI_TRANSITIONS=309} [2024-06-14 13:08:44,061 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-14 13:08:44,061 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 309 transitions, 5526 flow [2024-06-14 13:08:44,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:44,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:44,062 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, 1, 1] [2024-06-14 13:08:44,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:08:44,062 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:44,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:44,062 INFO L85 PathProgramCache]: Analyzing trace with hash -791636606, now seen corresponding path program 3 times [2024-06-14 13:08:44,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:44,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702187486] [2024-06-14 13:08:44,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:44,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:47,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:47,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:47,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702187486] [2024-06-14 13:08:47,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702187486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:47,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:47,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:08:47,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829798329] [2024-06-14 13:08:47,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:47,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:08:47,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:47,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:08:47,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:08:47,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:08:47,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 309 transitions, 5526 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:47,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:47,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:08:47,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:49,733 INFO L124 PetriNetUnfolderBase]: 2174/3948 cut-off events. [2024-06-14 13:08:49,733 INFO L125 PetriNetUnfolderBase]: For 179050/179055 co-relation queries the response was YES. [2024-06-14 13:08:49,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27344 conditions, 3948 events. 2174/3948 cut-off events. For 179050/179055 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 28630 event pairs, 258 based on Foata normal form. 23/3969 useless extension candidates. Maximal degree in co-relation 27234. Up to 1622 conditions per place. [2024-06-14 13:08:49,769 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 170 selfloop transitions, 158 changer transitions 24/358 dead transitions. [2024-06-14 13:08:49,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 358 transitions, 6598 flow [2024-06-14 13:08:49,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:08:49,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:08:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 220 transitions. [2024-06-14 13:08:49,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40293040293040294 [2024-06-14 13:08:49,771 INFO L175 Difference]: Start difference. First operand has 269 places, 309 transitions, 5526 flow. Second operand 13 states and 220 transitions. [2024-06-14 13:08:49,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 358 transitions, 6598 flow [2024-06-14 13:08:50,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 358 transitions, 6331 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:50,300 INFO L231 Difference]: Finished difference. Result has 277 places, 290 transitions, 5194 flow [2024-06-14 13:08:50,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5259, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5194, PETRI_PLACES=277, PETRI_TRANSITIONS=290} [2024-06-14 13:08:50,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-14 13:08:50,301 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 290 transitions, 5194 flow [2024-06-14 13:08:50,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:50,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:50,302 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, 1, 1] [2024-06-14 13:08:50,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:08:50,302 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:50,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:50,302 INFO L85 PathProgramCache]: Analyzing trace with hash 898028357, now seen corresponding path program 4 times [2024-06-14 13:08:50,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:50,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607111086] [2024-06-14 13:08:50,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:50,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:53,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:53,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607111086] [2024-06-14 13:08:53,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607111086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:53,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:53,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:08:53,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111204290] [2024-06-14 13:08:53,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:53,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:08:53,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:53,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:08:53,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:08:53,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:08:53,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 290 transitions, 5194 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:53,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:53,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:08:53,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:55,323 INFO L124 PetriNetUnfolderBase]: 2079/3787 cut-off events. [2024-06-14 13:08:55,323 INFO L125 PetriNetUnfolderBase]: For 179418/179418 co-relation queries the response was YES. [2024-06-14 13:08:55,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26521 conditions, 3787 events. 2079/3787 cut-off events. For 179418/179418 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 27324 event pairs, 364 based on Foata normal form. 12/3797 useless extension candidates. Maximal degree in co-relation 26410. Up to 2071 conditions per place. [2024-06-14 13:08:55,364 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 226 selfloop transitions, 88 changer transitions 0/320 dead transitions. [2024-06-14 13:08:55,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 320 transitions, 6062 flow [2024-06-14 13:08:55,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:55,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:55,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 13:08:55,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-14 13:08:55,367 INFO L175 Difference]: Start difference. First operand has 277 places, 290 transitions, 5194 flow. Second operand 9 states and 149 transitions. [2024-06-14 13:08:55,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 320 transitions, 6062 flow [2024-06-14 13:08:55,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 320 transitions, 5779 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-14 13:08:55,798 INFO L231 Difference]: Finished difference. Result has 271 places, 294 transitions, 5237 flow [2024-06-14 13:08:55,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4924, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5237, PETRI_PLACES=271, PETRI_TRANSITIONS=294} [2024-06-14 13:08:55,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-14 13:08:55,798 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 294 transitions, 5237 flow [2024-06-14 13:08:55,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:55,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:55,799 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, 1, 1] [2024-06-14 13:08:55,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:08:55,799 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:55,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:55,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1063012853, now seen corresponding path program 5 times [2024-06-14 13:08:55,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:55,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375842569] [2024-06-14 13:08:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:55,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:55,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:59,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:59,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375842569] [2024-06-14 13:08:59,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375842569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:59,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:59,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:08:59,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360123397] [2024-06-14 13:08:59,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:59,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:08:59,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:59,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:08:59,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:08:59,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:08:59,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 294 transitions, 5237 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:59,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:59,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:08:59,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:01,015 INFO L124 PetriNetUnfolderBase]: 2111/3853 cut-off events. [2024-06-14 13:09:01,015 INFO L125 PetriNetUnfolderBase]: For 167871/167871 co-relation queries the response was YES. [2024-06-14 13:09:01,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26658 conditions, 3853 events. 2111/3853 cut-off events. For 167871/167871 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 28078 event pairs, 462 based on Foata normal form. 6/3857 useless extension candidates. Maximal degree in co-relation 26550. Up to 2785 conditions per place. [2024-06-14 13:09:01,063 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 224 selfloop transitions, 98 changer transitions 0/328 dead transitions. [2024-06-14 13:09:01,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 328 transitions, 6144 flow [2024-06-14 13:09:01,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:09:01,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:09:01,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-14 13:09:01,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:09:01,064 INFO L175 Difference]: Start difference. First operand has 271 places, 294 transitions, 5237 flow. Second operand 10 states and 168 transitions. [2024-06-14 13:09:01,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 328 transitions, 6144 flow [2024-06-14 13:09:01,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 328 transitions, 5874 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-14 13:09:01,539 INFO L231 Difference]: Finished difference. Result has 274 places, 298 transitions, 5322 flow [2024-06-14 13:09:01,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5004, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5322, PETRI_PLACES=274, PETRI_TRANSITIONS=298} [2024-06-14 13:09:01,539 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-14 13:09:01,539 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 298 transitions, 5322 flow [2024-06-14 13:09:01,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:01,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:01,539 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, 1, 1] [2024-06-14 13:09:01,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:09:01,540 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:01,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:01,540 INFO L85 PathProgramCache]: Analyzing trace with hash -470038378, now seen corresponding path program 4 times [2024-06-14 13:09:01,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:01,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429393009] [2024-06-14 13:09:01,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:01,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:05,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:05,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429393009] [2024-06-14 13:09:05,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429393009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:05,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:05,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:09:05,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266453261] [2024-06-14 13:09:05,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:05,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:09:05,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:05,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:09:05,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:09:05,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:09:05,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 298 transitions, 5322 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:05,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:05,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:09:05,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:07,176 INFO L124 PetriNetUnfolderBase]: 2159/3963 cut-off events. [2024-06-14 13:09:07,176 INFO L125 PetriNetUnfolderBase]: For 184977/184977 co-relation queries the response was YES. [2024-06-14 13:09:07,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26851 conditions, 3963 events. 2159/3963 cut-off events. For 184977/184977 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 29157 event pairs, 341 based on Foata normal form. 18/3979 useless extension candidates. Maximal degree in co-relation 26742. Up to 2061 conditions per place. [2024-06-14 13:09:07,216 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 212 selfloop transitions, 70 changer transitions 42/330 dead transitions. [2024-06-14 13:09:07,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 330 transitions, 6117 flow [2024-06-14 13:09:07,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:09:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:09:07,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-14 13:09:07,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2024-06-14 13:09:07,217 INFO L175 Difference]: Start difference. First operand has 274 places, 298 transitions, 5322 flow. Second operand 11 states and 174 transitions. [2024-06-14 13:09:07,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 330 transitions, 6117 flow [2024-06-14 13:09:07,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 330 transitions, 5993 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 13:09:07,626 INFO L231 Difference]: Finished difference. Result has 281 places, 273 transitions, 4860 flow [2024-06-14 13:09:07,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5198, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4860, PETRI_PLACES=281, PETRI_TRANSITIONS=273} [2024-06-14 13:09:07,627 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-14 13:09:07,627 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 273 transitions, 4860 flow [2024-06-14 13:09:07,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:07,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:07,627 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, 1, 1] [2024-06-14 13:09:07,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:09:07,627 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:07,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:07,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1462866694, now seen corresponding path program 5 times [2024-06-14 13:09:07,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:07,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713519487] [2024-06-14 13:09:07,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:07,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:11,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:11,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713519487] [2024-06-14 13:09:11,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713519487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:11,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:11,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:09:11,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919328196] [2024-06-14 13:09:11,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:11,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:09:11,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:11,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:09:11,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:09:11,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:09:11,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 273 transitions, 4860 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:11,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:11,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:09:11,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:13,040 INFO L124 PetriNetUnfolderBase]: 2077/3835 cut-off events. [2024-06-14 13:09:13,040 INFO L125 PetriNetUnfolderBase]: For 213975/213975 co-relation queries the response was YES. [2024-06-14 13:09:13,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26614 conditions, 3835 events. 2077/3835 cut-off events. For 213975/213975 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 28134 event pairs, 317 based on Foata normal form. 18/3851 useless extension candidates. Maximal degree in co-relation 26504. Up to 1487 conditions per place. [2024-06-14 13:09:13,082 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 169 selfloop transitions, 127 changer transitions 11/313 dead transitions. [2024-06-14 13:09:13,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 313 transitions, 5953 flow [2024-06-14 13:09:13,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:09:13,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:09:13,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 199 transitions. [2024-06-14 13:09:13,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3948412698412698 [2024-06-14 13:09:13,084 INFO L175 Difference]: Start difference. First operand has 281 places, 273 transitions, 4860 flow. Second operand 12 states and 199 transitions. [2024-06-14 13:09:13,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 313 transitions, 5953 flow [2024-06-14 13:09:13,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 313 transitions, 5647 flow, removed 22 selfloop flow, removed 15 redundant places. [2024-06-14 13:09:13,527 INFO L231 Difference]: Finished difference. Result has 271 places, 269 transitions, 4792 flow [2024-06-14 13:09:13,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4578, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4792, PETRI_PLACES=271, PETRI_TRANSITIONS=269} [2024-06-14 13:09:13,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-14 13:09:13,528 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 269 transitions, 4792 flow [2024-06-14 13:09:13,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:13,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:13,528 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, 1, 1] [2024-06-14 13:09:13,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:09:13,528 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:13,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:13,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1530167858, now seen corresponding path program 6 times [2024-06-14 13:09:13,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:13,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266000831] [2024-06-14 13:09:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:13,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:17,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:17,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:17,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266000831] [2024-06-14 13:09:17,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266000831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:17,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:17,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:09:17,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544459357] [2024-06-14 13:09:17,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:17,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:09:17,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:17,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:09:17,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:09:17,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:09:17,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 269 transitions, 4792 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:17,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:17,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:09:17,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:19,534 INFO L124 PetriNetUnfolderBase]: 1954/3612 cut-off events. [2024-06-14 13:09:19,534 INFO L125 PetriNetUnfolderBase]: For 170313/170313 co-relation queries the response was YES. [2024-06-14 13:09:19,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24534 conditions, 3612 events. 1954/3612 cut-off events. For 170313/170313 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 26168 event pairs, 306 based on Foata normal form. 18/3628 useless extension candidates. Maximal degree in co-relation 24428. Up to 1487 conditions per place. [2024-06-14 13:09:19,576 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 147 selfloop transitions, 116 changer transitions 34/303 dead transitions. [2024-06-14 13:09:19,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 303 transitions, 5698 flow [2024-06-14 13:09:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:09:19,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:09:19,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-14 13:09:19,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-14 13:09:19,577 INFO L175 Difference]: Start difference. First operand has 271 places, 269 transitions, 4792 flow. Second operand 12 states and 194 transitions. [2024-06-14 13:09:19,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 303 transitions, 5698 flow [2024-06-14 13:09:19,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 303 transitions, 5426 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-14 13:09:19,930 INFO L231 Difference]: Finished difference. Result has 271 places, 250 transitions, 4426 flow [2024-06-14 13:09:19,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4528, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4426, PETRI_PLACES=271, PETRI_TRANSITIONS=250} [2024-06-14 13:09:19,930 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-14 13:09:19,930 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 250 transitions, 4426 flow [2024-06-14 13:09:19,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:19,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:19,930 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, 1, 1] [2024-06-14 13:09:19,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:09:19,930 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:19,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:19,931 INFO L85 PathProgramCache]: Analyzing trace with hash -983811031, now seen corresponding path program 6 times [2024-06-14 13:09:19,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:19,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185851586] [2024-06-14 13:09:19,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:19,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:23,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:23,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:23,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185851586] [2024-06-14 13:09:23,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185851586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:23,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:23,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:09:23,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105141724] [2024-06-14 13:09:23,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:23,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:09:23,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:23,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:09:23,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:09:23,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:09:23,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 250 transitions, 4426 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:23,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:23,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:09:23,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:24,760 INFO L124 PetriNetUnfolderBase]: 1890/3475 cut-off events. [2024-06-14 13:09:24,760 INFO L125 PetriNetUnfolderBase]: For 164063/164073 co-relation queries the response was YES. [2024-06-14 13:09:24,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24486 conditions, 3475 events. 1890/3475 cut-off events. For 164063/164073 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 24939 event pairs, 447 based on Foata normal form. 10/3476 useless extension candidates. Maximal degree in co-relation 24381. Up to 2460 conditions per place. [2024-06-14 13:09:24,798 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 101 changer transitions 0/290 dead transitions. [2024-06-14 13:09:24,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 290 transitions, 5513 flow [2024-06-14 13:09:24,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:09:24,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:09:24,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-14 13:09:24,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-14 13:09:24,800 INFO L175 Difference]: Start difference. First operand has 271 places, 250 transitions, 4426 flow. Second operand 10 states and 167 transitions. [2024-06-14 13:09:24,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 290 transitions, 5513 flow [2024-06-14 13:09:25,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 290 transitions, 5139 flow, removed 35 selfloop flow, removed 15 redundant places. [2024-06-14 13:09:25,132 INFO L231 Difference]: Finished difference. Result has 254 places, 258 transitions, 4545 flow [2024-06-14 13:09:25,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4116, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4545, PETRI_PLACES=254, PETRI_TRANSITIONS=258} [2024-06-14 13:09:25,132 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-14 13:09:25,132 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 258 transitions, 4545 flow [2024-06-14 13:09:25,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:25,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:25,133 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, 1, 1] [2024-06-14 13:09:25,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:09:25,133 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:25,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:25,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1654133550, now seen corresponding path program 4 times [2024-06-14 13:09:25,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:25,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617300104] [2024-06-14 13:09:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:25,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:28,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:28,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617300104] [2024-06-14 13:09:28,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617300104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:28,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:28,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:09:28,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55930178] [2024-06-14 13:09:28,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:28,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:09:28,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:28,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:09:28,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:09:28,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:09:28,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 258 transitions, 4545 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:28,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:28,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:09:28,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:30,515 INFO L124 PetriNetUnfolderBase]: 1902/3499 cut-off events. [2024-06-14 13:09:30,515 INFO L125 PetriNetUnfolderBase]: For 133432/133442 co-relation queries the response was YES. [2024-06-14 13:09:30,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23732 conditions, 3499 events. 1902/3499 cut-off events. For 133432/133442 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 25161 event pairs, 426 based on Foata normal form. 6/3489 useless extension candidates. Maximal degree in co-relation 23633. Up to 1919 conditions per place. [2024-06-14 13:09:30,545 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 175 selfloop transitions, 97 changer transitions 0/278 dead transitions. [2024-06-14 13:09:30,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 278 transitions, 5173 flow [2024-06-14 13:09:30,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:09:30,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:09:30,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-14 13:09:30,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-14 13:09:30,547 INFO L175 Difference]: Start difference. First operand has 254 places, 258 transitions, 4545 flow. Second operand 10 states and 158 transitions. [2024-06-14 13:09:30,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 278 transitions, 5173 flow [2024-06-14 13:09:30,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 278 transitions, 5049 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 13:09:30,807 INFO L231 Difference]: Finished difference. Result has 261 places, 260 transitions, 4678 flow [2024-06-14 13:09:30,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4421, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4678, PETRI_PLACES=261, PETRI_TRANSITIONS=260} [2024-06-14 13:09:30,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-14 13:09:30,807 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 260 transitions, 4678 flow [2024-06-14 13:09:30,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:30,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:30,807 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, 1, 1] [2024-06-14 13:09:30,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:09:30,808 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:30,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:30,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1070380883, now seen corresponding path program 7 times [2024-06-14 13:09:30,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:30,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682427386] [2024-06-14 13:09:30,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:30,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:30,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:33,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:33,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682427386] [2024-06-14 13:09:33,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682427386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:33,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:33,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:09:33,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588173798] [2024-06-14 13:09:33,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:33,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:09:33,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:33,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:09:33,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:09:33,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:09:33,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 260 transitions, 4678 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:33,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:33,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:09:33,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:35,894 INFO L124 PetriNetUnfolderBase]: 1884/3475 cut-off events. [2024-06-14 13:09:35,894 INFO L125 PetriNetUnfolderBase]: For 133817/133827 co-relation queries the response was YES. [2024-06-14 13:09:35,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23530 conditions, 3475 events. 1884/3475 cut-off events. For 133817/133827 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 24962 event pairs, 475 based on Foata normal form. 10/3476 useless extension candidates. Maximal degree in co-relation 23428. Up to 2507 conditions per place. [2024-06-14 13:09:35,934 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 175 selfloop transitions, 110 changer transitions 0/291 dead transitions. [2024-06-14 13:09:35,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 291 transitions, 5402 flow [2024-06-14 13:09:35,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:09:35,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:09:35,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-14 13:09:35,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 13:09:35,935 INFO L175 Difference]: Start difference. First operand has 261 places, 260 transitions, 4678 flow. Second operand 12 states and 192 transitions. [2024-06-14 13:09:35,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 291 transitions, 5402 flow [2024-06-14 13:09:36,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 291 transitions, 5170 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-14 13:09:36,227 INFO L231 Difference]: Finished difference. Result has 266 places, 264 transitions, 4748 flow [2024-06-14 13:09:36,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4446, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4748, PETRI_PLACES=266, PETRI_TRANSITIONS=264} [2024-06-14 13:09:36,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-14 13:09:36,228 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 264 transitions, 4748 flow [2024-06-14 13:09:36,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:36,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:36,228 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, 1, 1] [2024-06-14 13:09:36,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:09:36,228 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:36,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:36,229 INFO L85 PathProgramCache]: Analyzing trace with hash 796212474, now seen corresponding path program 7 times [2024-06-14 13:09:36,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:36,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24919762] [2024-06-14 13:09:36,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:36,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:39,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:39,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24919762] [2024-06-14 13:09:39,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24919762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:39,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:39,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:09:39,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768666257] [2024-06-14 13:09:39,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:39,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:09:39,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:39,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:09:39,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:09:39,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:09:39,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 264 transitions, 4748 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:39,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:39,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:09:39,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:41,289 INFO L124 PetriNetUnfolderBase]: 2102/3887 cut-off events. [2024-06-14 13:09:41,289 INFO L125 PetriNetUnfolderBase]: For 170646/170656 co-relation queries the response was YES. [2024-06-14 13:09:41,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26471 conditions, 3887 events. 2102/3887 cut-off events. For 170646/170656 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 28745 event pairs, 614 based on Foata normal form. 20/3894 useless extension candidates. Maximal degree in co-relation 26368. Up to 2348 conditions per place. [2024-06-14 13:09:41,333 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 218 selfloop transitions, 72 changer transitions 11/307 dead transitions. [2024-06-14 13:09:41,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 307 transitions, 5825 flow [2024-06-14 13:09:41,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:09:41,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:09:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 218 transitions. [2024-06-14 13:09:41,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-14 13:09:41,334 INFO L175 Difference]: Start difference. First operand has 266 places, 264 transitions, 4748 flow. Second operand 14 states and 218 transitions. [2024-06-14 13:09:41,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 307 transitions, 5825 flow [2024-06-14 13:09:41,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 307 transitions, 5554 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-14 13:09:41,713 INFO L231 Difference]: Finished difference. Result has 270 places, 266 transitions, 4722 flow [2024-06-14 13:09:41,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4481, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4722, PETRI_PLACES=270, PETRI_TRANSITIONS=266} [2024-06-14 13:09:41,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-14 13:09:41,714 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 266 transitions, 4722 flow [2024-06-14 13:09:41,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:41,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:41,714 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, 1, 1] [2024-06-14 13:09:41,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:09:41,714 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:41,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:41,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1406476849, now seen corresponding path program 8 times [2024-06-14 13:09:41,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:41,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10388125] [2024-06-14 13:09:41,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:41,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:45,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:45,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10388125] [2024-06-14 13:09:45,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10388125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:45,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:45,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:09:45,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291334183] [2024-06-14 13:09:45,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:45,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:09:45,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:45,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:09:45,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:09:45,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:09:45,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 266 transitions, 4722 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:45,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:45,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:09:45,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:47,615 INFO L124 PetriNetUnfolderBase]: 2054/3789 cut-off events. [2024-06-14 13:09:47,615 INFO L125 PetriNetUnfolderBase]: For 175978/175988 co-relation queries the response was YES. [2024-06-14 13:09:47,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26663 conditions, 3789 events. 2054/3789 cut-off events. For 175978/175988 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 27886 event pairs, 396 based on Foata normal form. 10/3786 useless extension candidates. Maximal degree in co-relation 26558. Up to 1692 conditions per place. [2024-06-14 13:09:47,656 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 161 selfloop transitions, 137 changer transitions 0/304 dead transitions. [2024-06-14 13:09:47,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 304 transitions, 5759 flow [2024-06-14 13:09:47,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:09:47,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:09:47,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 196 transitions. [2024-06-14 13:09:47,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 13:09:47,657 INFO L175 Difference]: Start difference. First operand has 270 places, 266 transitions, 4722 flow. Second operand 12 states and 196 transitions. [2024-06-14 13:09:47,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 304 transitions, 5759 flow [2024-06-14 13:09:48,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 304 transitions, 5669 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:48,032 INFO L231 Difference]: Finished difference. Result has 275 places, 273 transitions, 5160 flow [2024-06-14 13:09:48,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4636, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5160, PETRI_PLACES=275, PETRI_TRANSITIONS=273} [2024-06-14 13:09:48,033 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-14 13:09:48,033 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 273 transitions, 5160 flow [2024-06-14 13:09:48,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:48,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:48,033 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, 1, 1] [2024-06-14 13:09:48,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:09:48,033 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:48,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:48,034 INFO L85 PathProgramCache]: Analyzing trace with hash -30364875, now seen corresponding path program 9 times [2024-06-14 13:09:48,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:48,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551610237] [2024-06-14 13:09:48,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:48,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:51,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:51,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:51,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551610237] [2024-06-14 13:09:51,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551610237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:51,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:51,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:09:51,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673524906] [2024-06-14 13:09:51,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:51,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:09:51,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:51,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:09:51,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:09:51,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:09:51,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 273 transitions, 5160 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:51,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:51,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:09:51,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:53,694 INFO L124 PetriNetUnfolderBase]: 2023/3748 cut-off events. [2024-06-14 13:09:53,695 INFO L125 PetriNetUnfolderBase]: For 171622/171632 co-relation queries the response was YES. [2024-06-14 13:09:53,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26354 conditions, 3748 events. 2023/3748 cut-off events. For 171622/171632 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 27571 event pairs, 505 based on Foata normal form. 16/3751 useless extension candidates. Maximal degree in co-relation 26249. Up to 2083 conditions per place. [2024-06-14 13:09:53,738 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 195 selfloop transitions, 95 changer transitions 0/296 dead transitions. [2024-06-14 13:09:53,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 296 transitions, 5804 flow [2024-06-14 13:09:53,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:09:53,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:09:53,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-14 13:09:53,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 13:09:53,740 INFO L175 Difference]: Start difference. First operand has 275 places, 273 transitions, 5160 flow. Second operand 11 states and 176 transitions. [2024-06-14 13:09:53,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 296 transitions, 5804 flow [2024-06-14 13:09:54,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 296 transitions, 5555 flow, removed 55 selfloop flow, removed 9 redundant places. [2024-06-14 13:09:54,145 INFO L231 Difference]: Finished difference. Result has 277 places, 273 transitions, 5117 flow [2024-06-14 13:09:54,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4911, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5117, PETRI_PLACES=277, PETRI_TRANSITIONS=273} [2024-06-14 13:09:54,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-14 13:09:54,146 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 273 transitions, 5117 flow [2024-06-14 13:09:54,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:54,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:54,146 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, 1, 1] [2024-06-14 13:09:54,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:09:54,146 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:54,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:54,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1699005456, now seen corresponding path program 5 times [2024-06-14 13:09:54,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:54,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476934668] [2024-06-14 13:09:54,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:54,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:57,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:57,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476934668] [2024-06-14 13:09:57,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476934668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:57,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:57,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:57,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092219013] [2024-06-14 13:09:57,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:57,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:57,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:57,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:57,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:57,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:09:57,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 273 transitions, 5117 flow. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:57,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:57,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:09:57,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:58,727 INFO L124 PetriNetUnfolderBase]: 2035/3791 cut-off events. [2024-06-14 13:09:58,727 INFO L125 PetriNetUnfolderBase]: For 157939/157949 co-relation queries the response was YES. [2024-06-14 13:09:58,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26377 conditions, 3791 events. 2035/3791 cut-off events. For 157939/157949 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 28030 event pairs, 444 based on Foata normal form. 6/3784 useless extension candidates. Maximal degree in co-relation 26272. Up to 2021 conditions per place. [2024-06-14 13:09:58,764 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 187 selfloop transitions, 100 changer transitions 0/293 dead transitions. [2024-06-14 13:09:58,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 293 transitions, 5865 flow [2024-06-14 13:09:58,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:09:58,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:09:58,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 13:09:58,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 13:09:58,765 INFO L175 Difference]: Start difference. First operand has 277 places, 273 transitions, 5117 flow. Second operand 9 states and 147 transitions. [2024-06-14 13:09:58,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 293 transitions, 5865 flow [2024-06-14 13:09:59,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 293 transitions, 5654 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-14 13:09:59,123 INFO L231 Difference]: Finished difference. Result has 276 places, 274 transitions, 5140 flow [2024-06-14 13:09:59,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4908, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5140, PETRI_PLACES=276, PETRI_TRANSITIONS=274} [2024-06-14 13:09:59,123 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-14 13:09:59,124 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 274 transitions, 5140 flow [2024-06-14 13:09:59,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:59,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:59,124 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, 1, 1] [2024-06-14 13:09:59,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:09:59,124 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:59,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:59,125 INFO L85 PathProgramCache]: Analyzing trace with hash -34089525, now seen corresponding path program 10 times [2024-06-14 13:09:59,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:59,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628054714] [2024-06-14 13:09:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:59,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:02,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:02,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628054714] [2024-06-14 13:10:02,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628054714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:02,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:02,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:10:02,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515754319] [2024-06-14 13:10:02,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:02,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:10:02,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:02,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:10:02,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:10:02,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:10:02,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 274 transitions, 5140 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:02,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:02,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:10:02,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:04,093 INFO L124 PetriNetUnfolderBase]: 2022/3746 cut-off events. [2024-06-14 13:10:04,093 INFO L125 PetriNetUnfolderBase]: For 151408/151408 co-relation queries the response was YES. [2024-06-14 13:10:04,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25933 conditions, 3746 events. 2022/3746 cut-off events. For 151408/151408 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 27658 event pairs, 649 based on Foata normal form. 6/3750 useless extension candidates. Maximal degree in co-relation 25828. Up to 3200 conditions per place. [2024-06-14 13:10:04,135 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 260 selfloop transitions, 29 changer transitions 0/295 dead transitions. [2024-06-14 13:10:04,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 295 transitions, 5848 flow [2024-06-14 13:10:04,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:04,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:04,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-14 13:10:04,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-14 13:10:04,137 INFO L175 Difference]: Start difference. First operand has 276 places, 274 transitions, 5140 flow. Second operand 9 states and 142 transitions. [2024-06-14 13:10:04,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 295 transitions, 5848 flow [2024-06-14 13:10:04,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 295 transitions, 5559 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 13:10:04,527 INFO L231 Difference]: Finished difference. Result has 278 places, 276 transitions, 4976 flow [2024-06-14 13:10:04,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4851, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4976, PETRI_PLACES=278, PETRI_TRANSITIONS=276} [2024-06-14 13:10:04,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-14 13:10:04,527 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 276 transitions, 4976 flow [2024-06-14 13:10:04,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:04,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:04,528 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, 1, 1] [2024-06-14 13:10:04,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:10:04,528 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:04,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:04,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1923097326, now seen corresponding path program 6 times [2024-06-14 13:10:04,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:04,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691774741] [2024-06-14 13:10:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:04,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:07,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:07,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691774741] [2024-06-14 13:10:07,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691774741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:07,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:07,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:07,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979625062] [2024-06-14 13:10:07,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:07,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:07,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:07,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:07,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:07,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:10:07,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 276 transitions, 4976 flow. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:07,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:07,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:10:07,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:08,987 INFO L124 PetriNetUnfolderBase]: 2006/3727 cut-off events. [2024-06-14 13:10:08,987 INFO L125 PetriNetUnfolderBase]: For 144790/144800 co-relation queries the response was YES. [2024-06-14 13:10:09,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25016 conditions, 3727 events. 2006/3727 cut-off events. For 144790/144800 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 27501 event pairs, 649 based on Foata normal form. 6/3720 useless extension candidates. Maximal degree in co-relation 24911. Up to 2764 conditions per place. [2024-06-14 13:10:09,027 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 226 selfloop transitions, 59 changer transitions 0/291 dead transitions. [2024-06-14 13:10:09,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 291 transitions, 5605 flow [2024-06-14 13:10:09,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:10:09,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:10:09,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-14 13:10:09,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-14 13:10:09,029 INFO L175 Difference]: Start difference. First operand has 278 places, 276 transitions, 4976 flow. Second operand 10 states and 154 transitions. [2024-06-14 13:10:09,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 291 transitions, 5605 flow [2024-06-14 13:10:09,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 291 transitions, 5289 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-06-14 13:10:09,515 INFO L231 Difference]: Finished difference. Result has 278 places, 277 transitions, 4808 flow [2024-06-14 13:10:09,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4660, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4808, PETRI_PLACES=278, PETRI_TRANSITIONS=277} [2024-06-14 13:10:09,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-14 13:10:09,516 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 277 transitions, 4808 flow [2024-06-14 13:10:09,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:09,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:09,516 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, 1, 1] [2024-06-14 13:10:09,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:10:09,516 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:09,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:09,518 INFO L85 PathProgramCache]: Analyzing trace with hash 796217124, now seen corresponding path program 8 times [2024-06-14 13:10:09,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:09,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435075860] [2024-06-14 13:10:09,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:09,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:12,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:12,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435075860] [2024-06-14 13:10:12,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435075860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:12,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:12,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:10:12,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502898625] [2024-06-14 13:10:12,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:12,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:10:12,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:12,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:10:12,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:10:13,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:10:13,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 277 transitions, 4808 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:13,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:13,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:10:13,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:14,806 INFO L124 PetriNetUnfolderBase]: 2082/3887 cut-off events. [2024-06-14 13:10:14,806 INFO L125 PetriNetUnfolderBase]: For 176071/176081 co-relation queries the response was YES. [2024-06-14 13:10:14,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24846 conditions, 3887 events. 2082/3887 cut-off events. For 176071/176081 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 29212 event pairs, 423 based on Foata normal form. 32/3906 useless extension candidates. Maximal degree in co-relation 24743. Up to 1871 conditions per place. [2024-06-14 13:10:14,846 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 185 selfloop transitions, 88 changer transitions 29/308 dead transitions. [2024-06-14 13:10:14,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 308 transitions, 5644 flow [2024-06-14 13:10:14,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:10:14,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:10:14,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-14 13:10:14,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3852813852813853 [2024-06-14 13:10:14,848 INFO L175 Difference]: Start difference. First operand has 278 places, 277 transitions, 4808 flow. Second operand 11 states and 178 transitions. [2024-06-14 13:10:14,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 308 transitions, 5644 flow [2024-06-14 13:10:15,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 308 transitions, 5546 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:10:15,186 INFO L231 Difference]: Finished difference. Result has 284 places, 259 transitions, 4553 flow [2024-06-14 13:10:15,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4712, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4553, PETRI_PLACES=284, PETRI_TRANSITIONS=259} [2024-06-14 13:10:15,186 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-14 13:10:15,186 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 259 transitions, 4553 flow [2024-06-14 13:10:15,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:15,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:15,186 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, 1, 1, 1] [2024-06-14 13:10:15,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:10:15,186 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:15,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:15,187 INFO L85 PathProgramCache]: Analyzing trace with hash -30370610, now seen corresponding path program 7 times [2024-06-14 13:10:15,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:15,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243628837] [2024-06-14 13:10:15,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:15,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:18,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:18,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243628837] [2024-06-14 13:10:18,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243628837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:18,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:18,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:10:18,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701177882] [2024-06-14 13:10:18,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:18,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:10:18,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:18,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:10:18,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:10:18,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:10:18,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 259 transitions, 4553 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:18,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:18,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:10:18,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:20,400 INFO L124 PetriNetUnfolderBase]: 1904/3553 cut-off events. [2024-06-14 13:10:20,401 INFO L125 PetriNetUnfolderBase]: For 143125/143135 co-relation queries the response was YES. [2024-06-14 13:10:20,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23241 conditions, 3553 events. 1904/3553 cut-off events. For 143125/143135 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 26007 event pairs, 430 based on Foata normal form. 6/3546 useless extension candidates. Maximal degree in co-relation 23137. Up to 1960 conditions per place. [2024-06-14 13:10:20,438 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 184 selfloop transitions, 85 changer transitions 0/275 dead transitions. [2024-06-14 13:10:20,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 275 transitions, 5133 flow [2024-06-14 13:10:20,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:20,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:20,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 13:10:20,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 13:10:20,440 INFO L175 Difference]: Start difference. First operand has 284 places, 259 transitions, 4553 flow. Second operand 9 states and 144 transitions. [2024-06-14 13:10:20,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 275 transitions, 5133 flow [2024-06-14 13:10:20,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 275 transitions, 4943 flow, removed 15 selfloop flow, removed 12 redundant places. [2024-06-14 13:10:20,742 INFO L231 Difference]: Finished difference. Result has 275 places, 259 transitions, 4542 flow [2024-06-14 13:10:20,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4363, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4542, PETRI_PLACES=275, PETRI_TRANSITIONS=259} [2024-06-14 13:10:20,742 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-14 13:10:20,742 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 259 transitions, 4542 flow [2024-06-14 13:10:20,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:20,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:20,743 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, 1, 1] [2024-06-14 13:10:20,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:10:20,743 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:20,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:20,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2038744872, now seen corresponding path program 9 times [2024-06-14 13:10:20,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:20,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027717609] [2024-06-14 13:10:20,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:20,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:25,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:25,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027717609] [2024-06-14 13:10:25,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027717609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:25,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:25,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:10:25,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138740576] [2024-06-14 13:10:25,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:25,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:10:25,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:25,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:10:25,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:10:25,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:10:25,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 259 transitions, 4542 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:25,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:25,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:10:25,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:26,565 INFO L124 PetriNetUnfolderBase]: 2033/3792 cut-off events. [2024-06-14 13:10:26,565 INFO L125 PetriNetUnfolderBase]: For 165016/165026 co-relation queries the response was YES. [2024-06-14 13:10:26,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24625 conditions, 3792 events. 2033/3792 cut-off events. For 165016/165026 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 28197 event pairs, 724 based on Foata normal form. 20/3803 useless extension candidates. Maximal degree in co-relation 24525. Up to 2724 conditions per place. [2024-06-14 13:10:26,604 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 214 selfloop transitions, 61 changer transitions 8/289 dead transitions. [2024-06-14 13:10:26,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 289 transitions, 5350 flow [2024-06-14 13:10:26,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:10:26,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:10:26,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-14 13:10:26,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-14 13:10:26,605 INFO L175 Difference]: Start difference. First operand has 275 places, 259 transitions, 4542 flow. Second operand 11 states and 180 transitions. [2024-06-14 13:10:26,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 289 transitions, 5350 flow [2024-06-14 13:10:26,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 289 transitions, 5167 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 13:10:26,926 INFO L231 Difference]: Finished difference. Result has 278 places, 257 transitions, 4463 flow [2024-06-14 13:10:26,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4361, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4463, PETRI_PLACES=278, PETRI_TRANSITIONS=257} [2024-06-14 13:10:26,926 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-14 13:10:26,926 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 257 transitions, 4463 flow [2024-06-14 13:10:26,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:26,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:26,927 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, 1, 1] [2024-06-14 13:10:26,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:10:26,927 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:26,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:26,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1923453702, now seen corresponding path program 10 times [2024-06-14 13:10:26,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:26,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9664217] [2024-06-14 13:10:26,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:26,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:30,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:30,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9664217] [2024-06-14 13:10:30,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9664217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:30,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:30,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:10:30,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825617543] [2024-06-14 13:10:30,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:30,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:10:30,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:30,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:10:30,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:10:30,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:10:30,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 257 transitions, 4463 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:30,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:30,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:10:30,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:32,153 INFO L124 PetriNetUnfolderBase]: 2124/3969 cut-off events. [2024-06-14 13:10:32,153 INFO L125 PetriNetUnfolderBase]: For 183383/183393 co-relation queries the response was YES. [2024-06-14 13:10:32,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25890 conditions, 3969 events. 2124/3969 cut-off events. For 183383/183393 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 29995 event pairs, 761 based on Foata normal form. 20/3976 useless extension candidates. Maximal degree in co-relation 25789. Up to 2487 conditions per place. [2024-06-14 13:10:32,194 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 211 selfloop transitions, 63 changer transitions 11/291 dead transitions. [2024-06-14 13:10:32,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 291 transitions, 5290 flow [2024-06-14 13:10:32,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:10:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:10:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 203 transitions. [2024-06-14 13:10:32,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717948717948718 [2024-06-14 13:10:32,195 INFO L175 Difference]: Start difference. First operand has 278 places, 257 transitions, 4463 flow. Second operand 13 states and 203 transitions. [2024-06-14 13:10:32,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 291 transitions, 5290 flow [2024-06-14 13:10:32,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 291 transitions, 5157 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 13:10:32,564 INFO L231 Difference]: Finished difference. Result has 281 places, 255 transitions, 4429 flow [2024-06-14 13:10:32,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4332, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4429, PETRI_PLACES=281, PETRI_TRANSITIONS=255} [2024-06-14 13:10:32,565 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-14 13:10:32,565 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 255 transitions, 4429 flow [2024-06-14 13:10:32,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:32,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:32,565 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, 1, 1] [2024-06-14 13:10:32,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:10:32,565 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:32,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:32,565 INFO L85 PathProgramCache]: Analyzing trace with hash 796396800, now seen corresponding path program 4 times [2024-06-14 13:10:32,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:32,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077916734] [2024-06-14 13:10:32,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:32,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:36,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:36,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077916734] [2024-06-14 13:10:36,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077916734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:36,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:36,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:10:36,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050560077] [2024-06-14 13:10:36,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:36,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:10:36,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:36,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:10:36,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:10:36,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:10:36,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 255 transitions, 4429 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:36,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:36,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:10:36,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:38,486 INFO L124 PetriNetUnfolderBase]: 2005/3764 cut-off events. [2024-06-14 13:10:38,487 INFO L125 PetriNetUnfolderBase]: For 165055/165065 co-relation queries the response was YES. [2024-06-14 13:10:38,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24374 conditions, 3764 events. 2005/3764 cut-off events. For 165055/165065 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 28228 event pairs, 509 based on Foata normal form. 16/3767 useless extension candidates. Maximal degree in co-relation 24273. Up to 2083 conditions per place. [2024-06-14 13:10:38,525 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 181 selfloop transitions, 87 changer transitions 0/274 dead transitions. [2024-06-14 13:10:38,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 274 transitions, 5035 flow [2024-06-14 13:10:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:38,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:10:38,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-14 13:10:38,526 INFO L175 Difference]: Start difference. First operand has 281 places, 255 transitions, 4429 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:10:38,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 274 transitions, 5035 flow [2024-06-14 13:10:38,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 274 transitions, 4879 flow, removed 31 selfloop flow, removed 10 redundant places. [2024-06-14 13:10:38,881 INFO L231 Difference]: Finished difference. Result has 277 places, 255 transitions, 4466 flow [2024-06-14 13:10:38,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4273, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4466, PETRI_PLACES=277, PETRI_TRANSITIONS=255} [2024-06-14 13:10:38,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-14 13:10:38,881 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 255 transitions, 4466 flow [2024-06-14 13:10:38,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:38,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:38,882 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, 1, 1] [2024-06-14 13:10:38,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:10:38,882 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:38,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:38,882 INFO L85 PathProgramCache]: Analyzing trace with hash 796390104, now seen corresponding path program 11 times [2024-06-14 13:10:38,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:38,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148094687] [2024-06-14 13:10:38,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:38,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:42,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:42,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148094687] [2024-06-14 13:10:42,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148094687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:42,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:42,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:10:42,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034592883] [2024-06-14 13:10:42,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:42,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:10:42,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:42,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:10:42,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:10:43,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:10:43,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 255 transitions, 4466 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:43,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:43,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:10:43,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:44,569 INFO L124 PetriNetUnfolderBase]: 2040/3845 cut-off events. [2024-06-14 13:10:44,569 INFO L125 PetriNetUnfolderBase]: For 167308/167318 co-relation queries the response was YES. [2024-06-14 13:10:44,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24571 conditions, 3845 events. 2040/3845 cut-off events. For 167308/167318 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 29056 event pairs, 860 based on Foata normal form. 20/3856 useless extension candidates. Maximal degree in co-relation 24471. Up to 3074 conditions per place. [2024-06-14 13:10:44,608 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 206 selfloop transitions, 46 changer transitions 13/271 dead transitions. [2024-06-14 13:10:44,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 271 transitions, 5066 flow [2024-06-14 13:10:44,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:44,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:44,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 13:10:44,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-14 13:10:44,610 INFO L175 Difference]: Start difference. First operand has 277 places, 255 transitions, 4466 flow. Second operand 9 states and 145 transitions. [2024-06-14 13:10:44,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 271 transitions, 5066 flow [2024-06-14 13:10:44,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 271 transitions, 4868 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 13:10:44,918 INFO L231 Difference]: Finished difference. Result has 277 places, 249 transitions, 4231 flow [2024-06-14 13:10:44,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4268, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4231, PETRI_PLACES=277, PETRI_TRANSITIONS=249} [2024-06-14 13:10:44,919 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-14 13:10:44,919 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 249 transitions, 4231 flow [2024-06-14 13:10:44,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:44,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:44,919 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, 1, 1] [2024-06-14 13:10:44,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:10:44,920 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:44,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:44,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2041541382, now seen corresponding path program 12 times [2024-06-14 13:10:44,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:44,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618797960] [2024-06-14 13:10:44,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:44,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:47,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:47,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618797960] [2024-06-14 13:10:47,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618797960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:47,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:47,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:10:47,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033231024] [2024-06-14 13:10:47,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:47,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:10:47,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:47,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:10:47,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:10:48,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:10:48,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 249 transitions, 4231 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:48,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:48,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:10:48,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:49,717 INFO L124 PetriNetUnfolderBase]: 2020/3821 cut-off events. [2024-06-14 13:10:49,717 INFO L125 PetriNetUnfolderBase]: For 148095/148105 co-relation queries the response was YES. [2024-06-14 13:10:49,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23717 conditions, 3821 events. 2020/3821 cut-off events. For 148095/148105 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 28882 event pairs, 464 based on Foata normal form. 20/3828 useless extension candidates. Maximal degree in co-relation 23617. Up to 1154 conditions per place. [2024-06-14 13:10:49,760 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 158 selfloop transitions, 101 changer transitions 17/282 dead transitions. [2024-06-14 13:10:49,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 282 transitions, 5017 flow [2024-06-14 13:10:49,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:10:49,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:10:49,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-14 13:10:49,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917748917748918 [2024-06-14 13:10:49,761 INFO L175 Difference]: Start difference. First operand has 277 places, 249 transitions, 4231 flow. Second operand 11 states and 181 transitions. [2024-06-14 13:10:49,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 282 transitions, 5017 flow [2024-06-14 13:10:50,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 282 transitions, 4896 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-14 13:10:50,082 INFO L231 Difference]: Finished difference. Result has 276 places, 242 transitions, 4236 flow [2024-06-14 13:10:50,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4114, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4236, PETRI_PLACES=276, PETRI_TRANSITIONS=242} [2024-06-14 13:10:50,082 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-14 13:10:50,082 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 242 transitions, 4236 flow [2024-06-14 13:10:50,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:50,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:50,082 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, 1, 1] [2024-06-14 13:10:50,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:10:50,083 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:50,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:50,083 INFO L85 PathProgramCache]: Analyzing trace with hash -2038740222, now seen corresponding path program 13 times [2024-06-14 13:10:50,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:50,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638055381] [2024-06-14 13:10:50,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:50,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:55,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:55,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638055381] [2024-06-14 13:10:55,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638055381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:55,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:55,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:10:55,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092960138] [2024-06-14 13:10:55,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:55,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:10:55,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:55,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:10:55,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:10:55,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:10:55,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 242 transitions, 4236 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:55,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:55,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:10:55,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:56,623 INFO L124 PetriNetUnfolderBase]: 1865/3542 cut-off events. [2024-06-14 13:10:56,624 INFO L125 PetriNetUnfolderBase]: For 133293/133303 co-relation queries the response was YES. [2024-06-14 13:10:56,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22189 conditions, 3542 events. 1865/3542 cut-off events. For 133293/133303 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 26391 event pairs, 729 based on Foata normal form. 20/3553 useless extension candidates. Maximal degree in co-relation 22091. Up to 2696 conditions per place. [2024-06-14 13:10:56,662 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 193 selfloop transitions, 49 changer transitions 20/268 dead transitions. [2024-06-14 13:10:56,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 268 transitions, 4888 flow [2024-06-14 13:10:56,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:10:56,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:10:56,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-14 13:10:56,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-06-14 13:10:56,663 INFO L175 Difference]: Start difference. First operand has 276 places, 242 transitions, 4236 flow. Second operand 11 states and 175 transitions. [2024-06-14 13:10:56,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 268 transitions, 4888 flow [2024-06-14 13:10:56,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 268 transitions, 4668 flow, removed 5 selfloop flow, removed 14 redundant places. [2024-06-14 13:10:56,960 INFO L231 Difference]: Finished difference. Result has 268 places, 236 transitions, 4025 flow [2024-06-14 13:10:56,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4016, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4025, PETRI_PLACES=268, PETRI_TRANSITIONS=236} [2024-06-14 13:10:56,961 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-14 13:10:56,961 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 236 transitions, 4025 flow [2024-06-14 13:10:56,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:56,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:56,961 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, 1, 1] [2024-06-14 13:10:56,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:10:56,961 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:56,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:56,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1923449052, now seen corresponding path program 14 times [2024-06-14 13:10:56,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:56,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027541118] [2024-06-14 13:10:56,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:56,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:00,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:00,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027541118] [2024-06-14 13:11:00,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027541118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:00,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:00,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:11:00,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952467132] [2024-06-14 13:11:00,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:00,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:11:00,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:00,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:11:00,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:11:00,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:11:00,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 236 transitions, 4025 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:00,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:00,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:11:00,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:02,227 INFO L124 PetriNetUnfolderBase]: 1816/3449 cut-off events. [2024-06-14 13:11:02,227 INFO L125 PetriNetUnfolderBase]: For 111409/111419 co-relation queries the response was YES. [2024-06-14 13:11:02,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21042 conditions, 3449 events. 1816/3449 cut-off events. For 111409/111419 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25609 event pairs, 711 based on Foata normal form. 20/3460 useless extension candidates. Maximal degree in co-relation 20949. Up to 2576 conditions per place. [2024-06-14 13:11:02,262 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 180 selfloop transitions, 53 changer transitions 25/264 dead transitions. [2024-06-14 13:11:02,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 264 transitions, 4655 flow [2024-06-14 13:11:02,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:11:02,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:11:02,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 201 transitions. [2024-06-14 13:11:02,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36813186813186816 [2024-06-14 13:11:02,264 INFO L175 Difference]: Start difference. First operand has 268 places, 236 transitions, 4025 flow. Second operand 13 states and 201 transitions. [2024-06-14 13:11:02,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 264 transitions, 4655 flow [2024-06-14 13:11:02,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 264 transitions, 4541 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-14 13:11:02,517 INFO L231 Difference]: Finished difference. Result has 264 places, 222 transitions, 3761 flow [2024-06-14 13:11:02,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3911, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3761, PETRI_PLACES=264, PETRI_TRANSITIONS=222} [2024-06-14 13:11:02,518 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-14 13:11:02,518 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 222 transitions, 3761 flow [2024-06-14 13:11:02,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:02,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:02,518 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, 1, 1] [2024-06-14 13:11:02,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:11:02,518 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:02,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:02,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1923276072, now seen corresponding path program 15 times [2024-06-14 13:11:02,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:02,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879455050] [2024-06-14 13:11:02,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:02,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:02,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:05,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:05,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879455050] [2024-06-14 13:11:05,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879455050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:05,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:05,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:11:05,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904023622] [2024-06-14 13:11:05,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:05,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:11:05,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:05,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:11:05,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:11:05,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:11:05,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 222 transitions, 3761 flow. Second operand has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:05,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:05,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:11:05,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:07,538 INFO L124 PetriNetUnfolderBase]: 1725/3294 cut-off events. [2024-06-14 13:11:07,538 INFO L125 PetriNetUnfolderBase]: For 107056/107066 co-relation queries the response was YES. [2024-06-14 13:11:07,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19920 conditions, 3294 events. 1725/3294 cut-off events. For 107056/107066 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 24418 event pairs, 674 based on Foata normal form. 20/3301 useless extension candidates. Maximal degree in co-relation 19829. Up to 2261 conditions per place. [2024-06-14 13:11:07,571 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 43 changer transitions 21/243 dead transitions. [2024-06-14 13:11:07,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 243 transitions, 4328 flow [2024-06-14 13:11:07,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:11:07,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:11:07,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 168 transitions. [2024-06-14 13:11:07,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-14 13:11:07,573 INFO L175 Difference]: Start difference. First operand has 264 places, 222 transitions, 3761 flow. Second operand 11 states and 168 transitions. [2024-06-14 13:11:07,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 243 transitions, 4328 flow [2024-06-14 13:11:07,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 243 transitions, 4141 flow, removed 21 selfloop flow, removed 12 redundant places. [2024-06-14 13:11:07,792 INFO L231 Difference]: Finished difference. Result has 259 places, 212 transitions, 3499 flow [2024-06-14 13:11:07,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3575, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3499, PETRI_PLACES=259, PETRI_TRANSITIONS=212} [2024-06-14 13:11:07,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-14 13:11:07,793 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 212 transitions, 3499 flow [2024-06-14 13:11:07,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:07,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:07,793 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, 1, 1, 1] [2024-06-14 13:11:07,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:11:07,793 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:07,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:07,793 INFO L85 PathProgramCache]: Analyzing trace with hash 420486165, now seen corresponding path program 1 times [2024-06-14 13:11:07,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:07,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069933496] [2024-06-14 13:11:07,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:07,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:12,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:12,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069933496] [2024-06-14 13:11:12,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069933496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:12,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:12,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:11:12,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796571854] [2024-06-14 13:11:12,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:12,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:11:12,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:12,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:11:12,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:11:12,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:11:12,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 212 transitions, 3499 flow. Second operand has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 11 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:12,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:12,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:11:12,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:13,424 INFO L124 PetriNetUnfolderBase]: 1646/3148 cut-off events. [2024-06-14 13:11:13,424 INFO L125 PetriNetUnfolderBase]: For 100376/100376 co-relation queries the response was YES. [2024-06-14 13:11:13,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18783 conditions, 3148 events. 1646/3148 cut-off events. For 100376/100376 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 23159 event pairs, 612 based on Foata normal form. 12/3158 useless extension candidates. Maximal degree in co-relation 18694. Up to 2662 conditions per place. [2024-06-14 13:11:13,448 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 199 selfloop transitions, 16 changer transitions 11/232 dead transitions. [2024-06-14 13:11:13,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 232 transitions, 4027 flow [2024-06-14 13:11:13,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:11:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:11:13,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-14 13:11:13,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-14 13:11:13,450 INFO L175 Difference]: Start difference. First operand has 259 places, 212 transitions, 3499 flow. Second operand 9 states and 139 transitions. [2024-06-14 13:11:13,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 232 transitions, 4027 flow [2024-06-14 13:11:13,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 232 transitions, 3842 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-14 13:11:13,652 INFO L231 Difference]: Finished difference. Result has 252 places, 210 transitions, 3337 flow [2024-06-14 13:11:13,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3318, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3337, PETRI_PLACES=252, PETRI_TRANSITIONS=210} [2024-06-14 13:11:13,652 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-14 13:11:13,653 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 210 transitions, 3337 flow [2024-06-14 13:11:13,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 11 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:13,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:13,653 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, 1, 1, 1] [2024-06-14 13:11:13,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:11:13,653 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:13,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:13,653 INFO L85 PathProgramCache]: Analyzing trace with hash 420481515, now seen corresponding path program 2 times [2024-06-14 13:11:13,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:13,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520577689] [2024-06-14 13:11:13,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:13,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:17,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:17,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520577689] [2024-06-14 13:11:17,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520577689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:17,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:17,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:11:17,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373176960] [2024-06-14 13:11:17,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:17,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:11:17,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:17,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:11:17,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:11:17,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:11:17,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 210 transitions, 3337 flow. Second operand has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 11 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:17,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:17,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:11:17,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:18,740 INFO L124 PetriNetUnfolderBase]: 1622/3104 cut-off events. [2024-06-14 13:11:18,740 INFO L125 PetriNetUnfolderBase]: For 99291/99291 co-relation queries the response was YES. [2024-06-14 13:11:18,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18081 conditions, 3104 events. 1622/3104 cut-off events. For 99291/99291 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 22765 event pairs, 626 based on Foata normal form. 12/3114 useless extension candidates. Maximal degree in co-relation 17994. Up to 2638 conditions per place. [2024-06-14 13:11:18,769 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 196 selfloop transitions, 14 changer transitions 13/229 dead transitions. [2024-06-14 13:11:18,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 229 transitions, 3839 flow [2024-06-14 13:11:18,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:11:18,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:11:18,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-14 13:11:18,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36243386243386244 [2024-06-14 13:11:18,770 INFO L175 Difference]: Start difference. First operand has 252 places, 210 transitions, 3337 flow. Second operand 9 states and 137 transitions. [2024-06-14 13:11:18,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 229 transitions, 3839 flow [2024-06-14 13:11:18,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 229 transitions, 3803 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:11:18,963 INFO L231 Difference]: Finished difference. Result has 250 places, 207 transitions, 3310 flow [2024-06-14 13:11:18,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3301, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3310, PETRI_PLACES=250, PETRI_TRANSITIONS=207} [2024-06-14 13:11:18,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-14 13:11:18,963 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 207 transitions, 3310 flow [2024-06-14 13:11:18,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 11 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:18,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:18,964 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, 1, 1, 1] [2024-06-14 13:11:18,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:11:18,964 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:18,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:18,964 INFO L85 PathProgramCache]: Analyzing trace with hash 535772685, now seen corresponding path program 3 times [2024-06-14 13:11:18,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:18,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865597041] [2024-06-14 13:11:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:18,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:22,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:22,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865597041] [2024-06-14 13:11:22,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865597041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:22,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:22,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:11:22,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509250107] [2024-06-14 13:11:22,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:22,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:11:22,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:22,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:11:22,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:11:22,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:11:22,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 207 transitions, 3310 flow. Second operand has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 11 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:22,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:22,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:11:22,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:24,594 INFO L124 PetriNetUnfolderBase]: 1630/3134 cut-off events. [2024-06-14 13:11:24,595 INFO L125 PetriNetUnfolderBase]: For 99776/99781 co-relation queries the response was YES. [2024-06-14 13:11:24,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18274 conditions, 3134 events. 1630/3134 cut-off events. For 99776/99781 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 23162 event pairs, 533 based on Foata normal form. 17/3149 useless extension candidates. Maximal degree in co-relation 18188. Up to 2260 conditions per place. [2024-06-14 13:11:24,624 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 39 changer transitions 15/243 dead transitions. [2024-06-14 13:11:24,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 243 transitions, 3983 flow [2024-06-14 13:11:24,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:11:24,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:11:24,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-14 13:11:24,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-14 13:11:24,625 INFO L175 Difference]: Start difference. First operand has 250 places, 207 transitions, 3310 flow. Second operand 11 states and 182 transitions. [2024-06-14 13:11:24,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 243 transitions, 3983 flow [2024-06-14 13:11:24,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 243 transitions, 3943 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 13:11:24,824 INFO L231 Difference]: Finished difference. Result has 248 places, 200 transitions, 3271 flow [2024-06-14 13:11:24,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3276, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3271, PETRI_PLACES=248, PETRI_TRANSITIONS=200} [2024-06-14 13:11:24,825 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-14 13:11:24,825 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 200 transitions, 3271 flow [2024-06-14 13:11:24,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 11 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:24,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:24,825 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, 1, 1, 1] [2024-06-14 13:11:24,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:11:24,825 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:24,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:24,826 INFO L85 PathProgramCache]: Analyzing trace with hash 535950315, now seen corresponding path program 4 times [2024-06-14 13:11:24,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:24,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119661014] [2024-06-14 13:11:24,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:24,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:28,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:28,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119661014] [2024-06-14 13:11:28,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119661014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:28,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:28,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:11:28,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142441173] [2024-06-14 13:11:28,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:28,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:11:28,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:28,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:11:28,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:11:28,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:11:28,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 200 transitions, 3271 flow. Second operand has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 11 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:28,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:28,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:11:28,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:30,245 INFO L124 PetriNetUnfolderBase]: 1542/2986 cut-off events. [2024-06-14 13:11:30,245 INFO L125 PetriNetUnfolderBase]: For 89712/89717 co-relation queries the response was YES. [2024-06-14 13:11:30,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16992 conditions, 2986 events. 1542/2986 cut-off events. For 89712/89717 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 21914 event pairs, 371 based on Foata normal form. 33/3017 useless extension candidates. Maximal degree in co-relation 16908. Up to 1816 conditions per place. [2024-06-14 13:11:30,272 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 159 selfloop transitions, 43 changer transitions 27/235 dead transitions. [2024-06-14 13:11:30,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 235 transitions, 3842 flow [2024-06-14 13:11:30,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:11:30,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:11:30,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-14 13:11:30,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-14 13:11:30,274 INFO L175 Difference]: Start difference. First operand has 248 places, 200 transitions, 3271 flow. Second operand 11 states and 180 transitions. [2024-06-14 13:11:30,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 235 transitions, 3842 flow [2024-06-14 13:11:30,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 235 transitions, 3780 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-14 13:11:30,461 INFO L231 Difference]: Finished difference. Result has 243 places, 182 transitions, 2910 flow [2024-06-14 13:11:30,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3209, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2910, PETRI_PLACES=243, PETRI_TRANSITIONS=182} [2024-06-14 13:11:30,461 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-14 13:11:30,461 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 182 transitions, 2910 flow [2024-06-14 13:11:30,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 11 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:30,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:30,462 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, 1, 1, 1] [2024-06-14 13:11:30,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:11:30,462 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:30,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:30,462 INFO L85 PathProgramCache]: Analyzing trace with hash 417685005, now seen corresponding path program 5 times [2024-06-14 13:11:30,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:30,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4173800] [2024-06-14 13:11:30,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:30,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:33,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:33,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4173800] [2024-06-14 13:11:33,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4173800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:33,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:33,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:33,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553631579] [2024-06-14 13:11:33,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:33,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:33,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:33,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:33,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:33,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:11:33,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 182 transitions, 2910 flow. Second operand has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:33,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:33,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:11:33,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:34,719 INFO L124 PetriNetUnfolderBase]: 1317/2555 cut-off events. [2024-06-14 13:11:34,719 INFO L125 PetriNetUnfolderBase]: For 63550/63563 co-relation queries the response was YES. [2024-06-14 13:11:34,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14437 conditions, 2555 events. 1317/2555 cut-off events. For 63550/63563 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 18049 event pairs, 399 based on Foata normal form. 21/2572 useless extension candidates. Maximal degree in co-relation 14356. Up to 1620 conditions per place. [2024-06-14 13:11:34,742 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 167 selfloop transitions, 26 changer transitions 13/212 dead transitions. [2024-06-14 13:11:34,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 212 transitions, 3474 flow [2024-06-14 13:11:34,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:11:34,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:11:34,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:11:34,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-14 13:11:34,743 INFO L175 Difference]: Start difference. First operand has 243 places, 182 transitions, 2910 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:11:34,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 212 transitions, 3474 flow [2024-06-14 13:11:34,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 212 transitions, 3269 flow, removed 5 selfloop flow, removed 17 redundant places. [2024-06-14 13:11:34,869 INFO L231 Difference]: Finished difference. Result has 230 places, 177 transitions, 2712 flow [2024-06-14 13:11:34,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2709, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2712, PETRI_PLACES=230, PETRI_TRANSITIONS=177} [2024-06-14 13:11:34,870 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-14 13:11:34,870 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 177 transitions, 2712 flow [2024-06-14 13:11:34,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:34,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:34,870 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, 1, 1, 1] [2024-06-14 13:11:34,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:11:34,870 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:34,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:34,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1736746913, now seen corresponding path program 1 times [2024-06-14 13:11:34,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:34,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281839051] [2024-06-14 13:11:34,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:34,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:38,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:38,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281839051] [2024-06-14 13:11:38,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281839051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:38,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:38,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:11:38,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140994377] [2024-06-14 13:11:38,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:38,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:11:38,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:38,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:11:38,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:11:38,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:11:38,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 177 transitions, 2712 flow. Second operand has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:38,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:38,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:11:38,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:40,392 INFO L124 PetriNetUnfolderBase]: 1242/2394 cut-off events. [2024-06-14 13:11:40,392 INFO L125 PetriNetUnfolderBase]: For 52266/52271 co-relation queries the response was YES. [2024-06-14 13:11:40,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13432 conditions, 2394 events. 1242/2394 cut-off events. For 52266/52271 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 16500 event pairs, 117 based on Foata normal form. 9/2402 useless extension candidates. Maximal degree in co-relation 13354. Up to 1117 conditions per place. [2024-06-14 13:11:40,409 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 119 selfloop transitions, 55 changer transitions 27/207 dead transitions. [2024-06-14 13:11:40,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 207 transitions, 3192 flow [2024-06-14 13:11:40,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:11:40,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:11:40,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 13:11:40,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-14 13:11:40,411 INFO L175 Difference]: Start difference. First operand has 230 places, 177 transitions, 2712 flow. Second operand 9 states and 157 transitions. [2024-06-14 13:11:40,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 207 transitions, 3192 flow [2024-06-14 13:11:40,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 207 transitions, 3114 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-14 13:11:40,529 INFO L231 Difference]: Finished difference. Result has 222 places, 161 transitions, 2477 flow [2024-06-14 13:11:40,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2634, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2477, PETRI_PLACES=222, PETRI_TRANSITIONS=161} [2024-06-14 13:11:40,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-14 13:11:40,530 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 161 transitions, 2477 flow [2024-06-14 13:11:40,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:40,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:40,530 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, 1, 1, 1] [2024-06-14 13:11:40,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:11:40,530 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:40,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:40,531 INFO L85 PathProgramCache]: Analyzing trace with hash 426927367, now seen corresponding path program 6 times [2024-06-14 13:11:40,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:40,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072318594] [2024-06-14 13:11:40,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:40,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:40,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:44,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:44,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:44,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072318594] [2024-06-14 13:11:44,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072318594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:44,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:44,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:11:44,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410248680] [2024-06-14 13:11:44,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:44,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:11:44,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:44,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:11:44,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:11:44,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:11:44,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 161 transitions, 2477 flow. Second operand has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 11 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:44,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:44,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:11:44,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:44,913 INFO L124 PetriNetUnfolderBase]: 1065/2028 cut-off events. [2024-06-14 13:11:44,913 INFO L125 PetriNetUnfolderBase]: For 45005/45005 co-relation queries the response was YES. [2024-06-14 13:11:44,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11209 conditions, 2028 events. 1065/2028 cut-off events. For 45005/45005 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 13640 event pairs, 209 based on Foata normal form. 12/2039 useless extension candidates. Maximal degree in co-relation 11135. Up to 1289 conditions per place. [2024-06-14 13:11:44,928 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 89 selfloop transitions, 82 changer transitions 12/189 dead transitions. [2024-06-14 13:11:44,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 189 transitions, 2925 flow [2024-06-14 13:11:44,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:11:44,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:11:44,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:11:44,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-14 13:11:44,930 INFO L175 Difference]: Start difference. First operand has 222 places, 161 transitions, 2477 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:11:44,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 189 transitions, 2925 flow [2024-06-14 13:11:45,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 189 transitions, 2718 flow, removed 7 selfloop flow, removed 15 redundant places. [2024-06-14 13:11:45,015 INFO L231 Difference]: Finished difference. Result has 207 places, 157 transitions, 2386 flow [2024-06-14 13:11:45,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2270, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2386, PETRI_PLACES=207, PETRI_TRANSITIONS=157} [2024-06-14 13:11:45,015 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-14 13:11:45,016 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 157 transitions, 2386 flow [2024-06-14 13:11:45,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 11 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:45,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:45,016 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, 1, 1, 1] [2024-06-14 13:11:45,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:11:45,016 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:45,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:45,017 INFO L85 PathProgramCache]: Analyzing trace with hash 131984235, now seen corresponding path program 7 times [2024-06-14 13:11:45,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:45,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300330228] [2024-06-14 13:11:45,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:45,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:48,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:48,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300330228] [2024-06-14 13:11:48,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300330228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:48,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:48,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:11:48,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683667499] [2024-06-14 13:11:48,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:48,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:11:48,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:48,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:11:48,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:11:48,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:11:48,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 157 transitions, 2386 flow. Second operand has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:48,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:48,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:11:48,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:49,929 INFO L124 PetriNetUnfolderBase]: 1021/1954 cut-off events. [2024-06-14 13:11:49,929 INFO L125 PetriNetUnfolderBase]: For 39284/39286 co-relation queries the response was YES. [2024-06-14 13:11:49,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10452 conditions, 1954 events. 1021/1954 cut-off events. For 39284/39286 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 13175 event pairs, 262 based on Foata normal form. 24/1974 useless extension candidates. Maximal degree in co-relation 10383. Up to 1153 conditions per place. [2024-06-14 13:11:49,946 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 99 selfloop transitions, 44 changer transitions 35/184 dead transitions. [2024-06-14 13:11:49,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 184 transitions, 2814 flow [2024-06-14 13:11:49,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:11:49,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:11:49,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-14 13:11:49,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 13:11:49,947 INFO L175 Difference]: Start difference. First operand has 207 places, 157 transitions, 2386 flow. Second operand 12 states and 189 transitions. [2024-06-14 13:11:49,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 184 transitions, 2814 flow [2024-06-14 13:11:50,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 184 transitions, 2742 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 13:11:50,022 INFO L231 Difference]: Finished difference. Result has 209 places, 135 transitions, 2054 flow [2024-06-14 13:11:50,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2314, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2054, PETRI_PLACES=209, PETRI_TRANSITIONS=135} [2024-06-14 13:11:50,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-14 13:11:50,023 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 135 transitions, 2054 flow [2024-06-14 13:11:50,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:50,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:50,023 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, 1, 1, 1] [2024-06-14 13:11:50,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:11:50,024 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:50,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:50,024 INFO L85 PathProgramCache]: Analyzing trace with hash 707470597, now seen corresponding path program 8 times [2024-06-14 13:11:50,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:50,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568055343] [2024-06-14 13:11:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:50,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:54,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:54,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568055343] [2024-06-14 13:11:54,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568055343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:54,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:54,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:11:54,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309199035] [2024-06-14 13:11:54,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:54,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:11:54,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:54,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:11:54,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:11:54,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:11:54,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 135 transitions, 2054 flow. Second operand has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:54,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:54,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:11:54,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:55,420 INFO L124 PetriNetUnfolderBase]: 869/1662 cut-off events. [2024-06-14 13:11:55,420 INFO L125 PetriNetUnfolderBase]: For 34049/34051 co-relation queries the response was YES. [2024-06-14 13:11:55,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9082 conditions, 1662 events. 869/1662 cut-off events. For 34049/34051 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 10636 event pairs, 200 based on Foata normal form. 12/1667 useless extension candidates. Maximal degree in co-relation 9015. Up to 629 conditions per place. [2024-06-14 13:11:55,432 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 92 selfloop transitions, 51 changer transitions 12/161 dead transitions. [2024-06-14 13:11:55,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 161 transitions, 2430 flow [2024-06-14 13:11:55,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:11:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:11:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 185 transitions. [2024-06-14 13:11:55,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36706349206349204 [2024-06-14 13:11:55,433 INFO L175 Difference]: Start difference. First operand has 209 places, 135 transitions, 2054 flow. Second operand 12 states and 185 transitions. [2024-06-14 13:11:55,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 161 transitions, 2430 flow [2024-06-14 13:11:55,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 161 transitions, 2244 flow, removed 4 selfloop flow, removed 15 redundant places. [2024-06-14 13:11:55,486 INFO L231 Difference]: Finished difference. Result has 191 places, 131 transitions, 1934 flow [2024-06-14 13:11:55,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1868, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1934, PETRI_PLACES=191, PETRI_TRANSITIONS=131} [2024-06-14 13:11:55,487 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-14 13:11:55,487 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 131 transitions, 1934 flow [2024-06-14 13:11:55,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:55,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:55,487 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, 1, 1, 1] [2024-06-14 13:11:55,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 13:11:55,487 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:55,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:55,487 INFO L85 PathProgramCache]: Analyzing trace with hash 166683695, now seen corresponding path program 9 times [2024-06-14 13:11:55,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:55,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853494167] [2024-06-14 13:11:55,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:55,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:59,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:59,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853494167] [2024-06-14 13:11:59,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853494167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:59,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:59,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:11:59,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836495222] [2024-06-14 13:11:59,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:59,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:11:59,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:59,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:11:59,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:11:59,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:11:59,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 131 transitions, 1934 flow. Second operand has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:59,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:59,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:11:59,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:00,613 INFO L124 PetriNetUnfolderBase]: 853/1652 cut-off events. [2024-06-14 13:12:00,614 INFO L125 PetriNetUnfolderBase]: For 31660/31662 co-relation queries the response was YES. [2024-06-14 13:12:00,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8593 conditions, 1652 events. 853/1652 cut-off events. For 31660/31662 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 10714 event pairs, 280 based on Foata normal form. 24/1672 useless extension candidates. Maximal degree in co-relation 8529. Up to 1013 conditions per place. [2024-06-14 13:12:00,625 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 89 selfloop transitions, 42 changer transitions 16/153 dead transitions. [2024-06-14 13:12:00,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 153 transitions, 2290 flow [2024-06-14 13:12:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:12:00,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:12:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-14 13:12:00,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-14 13:12:00,626 INFO L175 Difference]: Start difference. First operand has 191 places, 131 transitions, 1934 flow. Second operand 10 states and 162 transitions. [2024-06-14 13:12:00,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 153 transitions, 2290 flow [2024-06-14 13:12:00,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 153 transitions, 2107 flow, removed 8 selfloop flow, removed 14 redundant places. [2024-06-14 13:12:00,670 INFO L231 Difference]: Finished difference. Result has 183 places, 123 transitions, 1722 flow [2024-06-14 13:12:00,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1753, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1722, PETRI_PLACES=183, PETRI_TRANSITIONS=123} [2024-06-14 13:12:00,670 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-14 13:12:00,670 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 123 transitions, 1722 flow [2024-06-14 13:12:00,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:00,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:00,671 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, 1, 1, 1] [2024-06-14 13:12:00,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 13:12:00,671 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:00,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:00,671 INFO L85 PathProgramCache]: Analyzing trace with hash 166534740, now seen corresponding path program 1 times [2024-06-14 13:12:00,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:00,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971195217] [2024-06-14 13:12:00,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:00,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:04,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:04,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971195217] [2024-06-14 13:12:04,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971195217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:04,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:04,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:12:04,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197830577] [2024-06-14 13:12:04,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:04,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:12:04,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:04,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:12:04,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:12:05,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:12:05,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 123 transitions, 1722 flow. Second operand has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:05,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:05,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:12:05,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:06,224 INFO L124 PetriNetUnfolderBase]: 757/1474 cut-off events. [2024-06-14 13:12:06,225 INFO L125 PetriNetUnfolderBase]: For 23415/23417 co-relation queries the response was YES. [2024-06-14 13:12:06,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7373 conditions, 1474 events. 757/1474 cut-off events. For 23415/23417 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9356 event pairs, 312 based on Foata normal form. 12/1479 useless extension candidates. Maximal degree in co-relation 7311. Up to 991 conditions per place. [2024-06-14 13:12:06,236 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 94 selfloop transitions, 26 changer transitions 12/138 dead transitions. [2024-06-14 13:12:06,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 138 transitions, 2016 flow [2024-06-14 13:12:06,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:12:06,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:12:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-14 13:12:06,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3595238095238095 [2024-06-14 13:12:06,237 INFO L175 Difference]: Start difference. First operand has 183 places, 123 transitions, 1722 flow. Second operand 10 states and 151 transitions. [2024-06-14 13:12:06,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 138 transitions, 2016 flow [2024-06-14 13:12:06,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 138 transitions, 1879 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-14 13:12:06,274 INFO L231 Difference]: Finished difference. Result has 178 places, 118 transitions, 1576 flow [2024-06-14 13:12:06,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1585, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1576, PETRI_PLACES=178, PETRI_TRANSITIONS=118} [2024-06-14 13:12:06,275 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-14 13:12:06,275 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 118 transitions, 1576 flow [2024-06-14 13:12:06,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:06,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:06,275 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, 1, 1, 1] [2024-06-14 13:12:06,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 13:12:06,275 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:06,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:06,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1126763575, now seen corresponding path program 10 times [2024-06-14 13:12:06,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:06,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233068707] [2024-06-14 13:12:06,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:06,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:10,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:10,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233068707] [2024-06-14 13:12:10,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233068707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:10,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:10,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:12:10,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150755050] [2024-06-14 13:12:10,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:10,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:12:10,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:10,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:12:10,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:12:10,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:12:10,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 118 transitions, 1576 flow. Second operand has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:10,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:10,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:12:10,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:11,757 INFO L124 PetriNetUnfolderBase]: 761/1494 cut-off events. [2024-06-14 13:12:11,757 INFO L125 PetriNetUnfolderBase]: For 24409/24409 co-relation queries the response was YES. [2024-06-14 13:12:11,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7248 conditions, 1494 events. 761/1494 cut-off events. For 24409/24409 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 9586 event pairs, 294 based on Foata normal form. 12/1501 useless extension candidates. Maximal degree in co-relation 7189. Up to 1075 conditions per place. [2024-06-14 13:12:11,768 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 118 selfloop transitions, 13 changer transitions 7/144 dead transitions. [2024-06-14 13:12:11,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 144 transitions, 1988 flow [2024-06-14 13:12:11,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:12:11,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:12:11,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-14 13:12:11,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-14 13:12:11,769 INFO L175 Difference]: Start difference. First operand has 178 places, 118 transitions, 1576 flow. Second operand 10 states and 154 transitions. [2024-06-14 13:12:11,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 144 transitions, 1988 flow [2024-06-14 13:12:11,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 144 transitions, 1925 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 13:12:11,806 INFO L231 Difference]: Finished difference. Result has 177 places, 116 transitions, 1535 flow [2024-06-14 13:12:11,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1535, PETRI_PLACES=177, PETRI_TRANSITIONS=116} [2024-06-14 13:12:11,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-14 13:12:11,807 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 116 transitions, 1535 flow [2024-06-14 13:12:11,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:11,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:11,807 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, 1, 1, 1] [2024-06-14 13:12:11,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 13:12:11,808 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:11,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:11,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1011472405, now seen corresponding path program 11 times [2024-06-14 13:12:11,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:11,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487185361] [2024-06-14 13:12:11,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:11,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:15,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:15,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487185361] [2024-06-14 13:12:15,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487185361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:15,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:15,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:12:15,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619637853] [2024-06-14 13:12:15,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:15,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:12:15,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:15,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:12:15,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:12:15,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:12:15,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 116 transitions, 1535 flow. Second operand has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:15,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:15,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:12:15,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:17,030 INFO L124 PetriNetUnfolderBase]: 745/1466 cut-off events. [2024-06-14 13:12:17,030 INFO L125 PetriNetUnfolderBase]: For 25043/25045 co-relation queries the response was YES. [2024-06-14 13:12:17,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7118 conditions, 1466 events. 745/1466 cut-off events. For 25043/25045 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9408 event pairs, 188 based on Foata normal form. 12/1471 useless extension candidates. Maximal degree in co-relation 7059. Up to 617 conditions per place. [2024-06-14 13:12:17,039 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 85 selfloop transitions, 32 changer transitions 16/139 dead transitions. [2024-06-14 13:12:17,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 139 transitions, 1859 flow [2024-06-14 13:12:17,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:12:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:12:17,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 167 transitions. [2024-06-14 13:12:17,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36147186147186144 [2024-06-14 13:12:17,040 INFO L175 Difference]: Start difference. First operand has 177 places, 116 transitions, 1535 flow. Second operand 11 states and 167 transitions. [2024-06-14 13:12:17,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 139 transitions, 1859 flow [2024-06-14 13:12:17,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 139 transitions, 1828 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-14 13:12:17,074 INFO L231 Difference]: Finished difference. Result has 177 places, 112 transitions, 1534 flow [2024-06-14 13:12:17,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1534, PETRI_PLACES=177, PETRI_TRANSITIONS=112} [2024-06-14 13:12:17,075 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-14 13:12:17,075 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 112 transitions, 1534 flow [2024-06-14 13:12:17,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:17,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:17,075 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, 1, 1, 1] [2024-06-14 13:12:17,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 13:12:17,075 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:17,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:17,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1126758925, now seen corresponding path program 12 times [2024-06-14 13:12:17,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:17,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936432923] [2024-06-14 13:12:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:17,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:21,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:21,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936432923] [2024-06-14 13:12:21,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936432923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:21,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:21,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:12:21,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978898374] [2024-06-14 13:12:21,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:21,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:12:21,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:21,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:12:21,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:12:21,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:12:21,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 112 transitions, 1534 flow. Second operand has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:21,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:21,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:12:21,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:22,809 INFO L124 PetriNetUnfolderBase]: 673/1330 cut-off events. [2024-06-14 13:12:22,809 INFO L125 PetriNetUnfolderBase]: For 21607/21607 co-relation queries the response was YES. [2024-06-14 13:12:22,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6547 conditions, 1330 events. 673/1330 cut-off events. For 21607/21607 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8264 event pairs, 260 based on Foata normal form. 12/1337 useless extension candidates. Maximal degree in co-relation 6489. Up to 1035 conditions per place. [2024-06-14 13:12:22,818 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 99 selfloop transitions, 7 changer transitions 22/134 dead transitions. [2024-06-14 13:12:22,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 134 transitions, 1862 flow [2024-06-14 13:12:22,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:12:22,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:12:22,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2024-06-14 13:12:22,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523809523809524 [2024-06-14 13:12:22,819 INFO L175 Difference]: Start difference. First operand has 177 places, 112 transitions, 1534 flow. Second operand 10 states and 148 transitions. [2024-06-14 13:12:22,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 134 transitions, 1862 flow [2024-06-14 13:12:22,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 134 transitions, 1782 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-14 13:12:22,852 INFO L231 Difference]: Finished difference. Result has 169 places, 105 transitions, 1411 flow [2024-06-14 13:12:22,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1411, PETRI_PLACES=169, PETRI_TRANSITIONS=105} [2024-06-14 13:12:22,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-14 13:12:22,852 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 105 transitions, 1411 flow [2024-06-14 13:12:22,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:22,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:22,853 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, 1, 1, 1] [2024-06-14 13:12:22,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 13:12:22,853 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:22,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:22,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1778178765, now seen corresponding path program 13 times [2024-06-14 13:12:22,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:22,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652877502] [2024-06-14 13:12:22,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:22,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:26,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:26,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652877502] [2024-06-14 13:12:26,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652877502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:26,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:26,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:12:26,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073587427] [2024-06-14 13:12:26,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:26,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:12:26,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:26,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:12:26,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:12:27,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:12:27,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 105 transitions, 1411 flow. Second operand has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:27,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:27,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:12:27,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:28,295 INFO L124 PetriNetUnfolderBase]: 614/1223 cut-off events. [2024-06-14 13:12:28,295 INFO L125 PetriNetUnfolderBase]: For 17256/17258 co-relation queries the response was YES. [2024-06-14 13:12:28,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5781 conditions, 1223 events. 614/1223 cut-off events. For 17256/17258 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7503 event pairs, 138 based on Foata normal form. 12/1228 useless extension candidates. Maximal degree in co-relation 5727. Up to 382 conditions per place. [2024-06-14 13:12:28,304 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 84 selfloop transitions, 35 changer transitions 8/133 dead transitions. [2024-06-14 13:12:28,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 133 transitions, 1759 flow [2024-06-14 13:12:28,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:12:28,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:12:28,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 179 transitions. [2024-06-14 13:12:28,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3551587301587302 [2024-06-14 13:12:28,305 INFO L175 Difference]: Start difference. First operand has 169 places, 105 transitions, 1411 flow. Second operand 12 states and 179 transitions. [2024-06-14 13:12:28,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 133 transitions, 1759 flow [2024-06-14 13:12:28,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 133 transitions, 1690 flow, removed 11 selfloop flow, removed 12 redundant places. [2024-06-14 13:12:28,331 INFO L231 Difference]: Finished difference. Result has 158 places, 101 transitions, 1387 flow [2024-06-14 13:12:28,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1387, PETRI_PLACES=158, PETRI_TRANSITIONS=101} [2024-06-14 13:12:28,331 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-14 13:12:28,331 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 101 transitions, 1387 flow [2024-06-14 13:12:28,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:28,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:28,331 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, 1, 1, 1, 1] [2024-06-14 13:12:28,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 13:12:28,331 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:28,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:28,332 INFO L85 PathProgramCache]: Analyzing trace with hash -33957905, now seen corresponding path program 1 times [2024-06-14 13:12:28,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:28,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417562269] [2024-06-14 13:12:28,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:28,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:32,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:32,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417562269] [2024-06-14 13:12:32,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417562269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:32,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:32,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-14 13:12:32,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750553412] [2024-06-14 13:12:32,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:32,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-14 13:12:32,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:32,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-14 13:12:32,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-14 13:12:32,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:12:32,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 101 transitions, 1387 flow. Second operand has 13 states, 13 states have (on average 10.692307692307692) internal successors, (139), 13 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:32,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:32,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:12:32,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:33,965 INFO L124 PetriNetUnfolderBase]: 711/1454 cut-off events. [2024-06-14 13:12:33,965 INFO L125 PetriNetUnfolderBase]: For 14792/14792 co-relation queries the response was YES. [2024-06-14 13:12:33,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7017 conditions, 1454 events. 711/1454 cut-off events. For 14792/14792 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9277 event pairs, 233 based on Foata normal form. 8/1457 useless extension candidates. Maximal degree in co-relation 6968. Up to 785 conditions per place. [2024-06-14 13:12:33,975 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 104 selfloop transitions, 30 changer transitions 49/189 dead transitions. [2024-06-14 13:12:33,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 189 transitions, 2474 flow [2024-06-14 13:12:33,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 13:12:33,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 13:12:33,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 238 transitions. [2024-06-14 13:12:33,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-14 13:12:33,976 INFO L175 Difference]: Start difference. First operand has 158 places, 101 transitions, 1387 flow. Second operand 15 states and 238 transitions. [2024-06-14 13:12:33,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 189 transitions, 2474 flow [2024-06-14 13:12:34,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 189 transitions, 2337 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-14 13:12:34,002 INFO L231 Difference]: Finished difference. Result has 163 places, 110 transitions, 1526 flow [2024-06-14 13:12:34,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1526, PETRI_PLACES=163, PETRI_TRANSITIONS=110} [2024-06-14 13:12:34,002 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-14 13:12:34,002 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 110 transitions, 1526 flow [2024-06-14 13:12:34,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.692307692307692) internal successors, (139), 13 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:34,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:34,002 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, 1, 1, 1, 1, 1] [2024-06-14 13:12:34,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 13:12:34,002 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:34,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:34,003 INFO L85 PathProgramCache]: Analyzing trace with hash -940980813, now seen corresponding path program 2 times [2024-06-14 13:12:34,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:34,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324634397] [2024-06-14 13:12:34,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:34,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:37,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:37,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324634397] [2024-06-14 13:12:37,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324634397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:37,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:37,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:37,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001546137] [2024-06-14 13:12:37,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:37,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:37,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:37,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:37,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:37,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:12:37,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 110 transitions, 1526 flow. Second operand has 10 states, 10 states have (on average 11.2) internal successors, (112), 10 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:37,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:37,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:12:37,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:38,626 INFO L124 PetriNetUnfolderBase]: 573/1167 cut-off events. [2024-06-14 13:12:38,626 INFO L125 PetriNetUnfolderBase]: For 10911/10911 co-relation queries the response was YES. [2024-06-14 13:12:38,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5512 conditions, 1167 events. 573/1167 cut-off events. For 10911/10911 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7024 event pairs, 174 based on Foata normal form. 8/1174 useless extension candidates. Maximal degree in co-relation 5460. Up to 585 conditions per place. [2024-06-14 13:12:38,633 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 67 selfloop transitions, 25 changer transitions 39/137 dead transitions. [2024-06-14 13:12:38,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 137 transitions, 1850 flow [2024-06-14 13:12:38,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:12:38,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:12:38,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 184 transitions. [2024-06-14 13:12:38,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-14 13:12:38,634 INFO L175 Difference]: Start difference. First operand has 163 places, 110 transitions, 1526 flow. Second operand 12 states and 184 transitions. [2024-06-14 13:12:38,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 137 transitions, 1850 flow [2024-06-14 13:12:38,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 137 transitions, 1778 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 13:12:38,654 INFO L231 Difference]: Finished difference. Result has 161 places, 84 transitions, 1075 flow [2024-06-14 13:12:38,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1075, PETRI_PLACES=161, PETRI_TRANSITIONS=84} [2024-06-14 13:12:38,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-14 13:12:38,655 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 84 transitions, 1075 flow [2024-06-14 13:12:38,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.2) internal successors, (112), 10 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:38,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:38,655 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, 1, 1, 1, 1] [2024-06-14 13:12:38,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 13:12:38,655 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:38,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:38,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1208908613, now seen corresponding path program 3 times [2024-06-14 13:12:38,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:38,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998033313] [2024-06-14 13:12:38,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:38,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:42,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:42,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:42,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998033313] [2024-06-14 13:12:42,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998033313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:42,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:42,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:12:42,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129532847] [2024-06-14 13:12:42,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:42,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:12:42,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:42,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:12:42,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:12:42,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:12:42,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 84 transitions, 1075 flow. Second operand has 12 states, 12 states have (on average 10.833333333333334) internal successors, (130), 12 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:42,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:42,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:12:42,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:43,764 INFO L124 PetriNetUnfolderBase]: 398/783 cut-off events. [2024-06-14 13:12:43,764 INFO L125 PetriNetUnfolderBase]: For 7005/7005 co-relation queries the response was YES. [2024-06-14 13:12:43,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3588 conditions, 783 events. 398/783 cut-off events. For 7005/7005 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4277 event pairs, 112 based on Foata normal form. 8/790 useless extension candidates. Maximal degree in co-relation 3539. Up to 323 conditions per place. [2024-06-14 13:12:43,768 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 43 selfloop transitions, 11 changer transitions 48/108 dead transitions. [2024-06-14 13:12:43,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 108 transitions, 1329 flow [2024-06-14 13:12:43,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:12:43,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:12:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 178 transitions. [2024-06-14 13:12:43,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3531746031746032 [2024-06-14 13:12:43,770 INFO L175 Difference]: Start difference. First operand has 161 places, 84 transitions, 1075 flow. Second operand 12 states and 178 transitions. [2024-06-14 13:12:43,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 108 transitions, 1329 flow [2024-06-14 13:12:43,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 108 transitions, 1119 flow, removed 10 selfloop flow, removed 27 redundant places. [2024-06-14 13:12:43,784 INFO L231 Difference]: Finished difference. Result has 136 places, 51 transitions, 410 flow [2024-06-14 13:12:43,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=410, PETRI_PLACES=136, PETRI_TRANSITIONS=51} [2024-06-14 13:12:43,785 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-14 13:12:43,785 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 51 transitions, 410 flow [2024-06-14 13:12:43,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.833333333333334) internal successors, (130), 12 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:43,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:43,785 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, 1, 1, 1, 1] [2024-06-14 13:12:43,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 13:12:43,785 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:43,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:43,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1015783113, now seen corresponding path program 4 times [2024-06-14 13:12:43,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:43,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773561685] [2024-06-14 13:12:43,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:43,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:47,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:47,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773561685] [2024-06-14 13:12:47,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773561685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:47,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:47,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:12:47,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746525582] [2024-06-14 13:12:47,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:47,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:12:47,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:47,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:12:47,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:12:47,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:12:47,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 51 transitions, 410 flow. Second operand has 12 states, 12 states have (on average 10.833333333333334) internal successors, (130), 12 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:47,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:47,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:12:47,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:48,920 INFO L124 PetriNetUnfolderBase]: 206/428 cut-off events. [2024-06-14 13:12:48,921 INFO L125 PetriNetUnfolderBase]: For 2544/2544 co-relation queries the response was YES. [2024-06-14 13:12:48,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1552 conditions, 428 events. 206/428 cut-off events. For 2544/2544 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2137 event pairs, 16 based on Foata normal form. 16/443 useless extension candidates. Maximal degree in co-relation 1509. Up to 81 conditions per place. [2024-06-14 13:12:48,922 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 28 selfloop transitions, 6 changer transitions 30/70 dead transitions. [2024-06-14 13:12:48,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 70 transitions, 576 flow [2024-06-14 13:12:48,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:12:48,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:12:48,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 143 transitions. [2024-06-14 13:12:48,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3404761904761905 [2024-06-14 13:12:48,923 INFO L175 Difference]: Start difference. First operand has 136 places, 51 transitions, 410 flow. Second operand 10 states and 143 transitions. [2024-06-14 13:12:48,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 70 transitions, 576 flow [2024-06-14 13:12:48,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 70 transitions, 480 flow, removed 10 selfloop flow, removed 23 redundant places. [2024-06-14 13:12:48,927 INFO L231 Difference]: Finished difference. Result has 104 places, 33 transitions, 164 flow [2024-06-14 13:12:48,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=164, PETRI_PLACES=104, PETRI_TRANSITIONS=33} [2024-06-14 13:12:48,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-14 13:12:48,928 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 33 transitions, 164 flow [2024-06-14 13:12:48,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.833333333333334) internal successors, (130), 12 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:48,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:48,928 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, 1, 1, 1, 1] [2024-06-14 13:12:48,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 13:12:48,928 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:48,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:48,928 INFO L85 PathProgramCache]: Analyzing trace with hash 310347195, now seen corresponding path program 5 times [2024-06-14 13:12:48,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:48,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15694516] [2024-06-14 13:12:48,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:48,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:52,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:52,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15694516] [2024-06-14 13:12:52,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15694516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:52,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:52,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:12:52,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518628104] [2024-06-14 13:12:52,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:52,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:12:52,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:52,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:12:52,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:12:52,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:12:52,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 33 transitions, 164 flow. Second operand has 11 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:52,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:52,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:12:52,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:53,617 INFO L124 PetriNetUnfolderBase]: 75/167 cut-off events. [2024-06-14 13:12:53,617 INFO L125 PetriNetUnfolderBase]: For 616/616 co-relation queries the response was YES. [2024-06-14 13:12:53,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 167 events. 75/167 cut-off events. For 616/616 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 557 event pairs, 3 based on Foata normal form. 8/174 useless extension candidates. Maximal degree in co-relation 474. Up to 40 conditions per place. [2024-06-14 13:12:53,618 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 0 selfloop transitions, 0 changer transitions 45/45 dead transitions. [2024-06-14 13:12:53,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 45 transitions, 246 flow [2024-06-14 13:12:53,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:53,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:53,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2024-06-14 13:12:53,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31746031746031744 [2024-06-14 13:12:53,619 INFO L175 Difference]: Start difference. First operand has 104 places, 33 transitions, 164 flow. Second operand 9 states and 120 transitions. [2024-06-14 13:12:53,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 45 transitions, 246 flow [2024-06-14 13:12:53,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 45 transitions, 195 flow, removed 4 selfloop flow, removed 18 redundant places. [2024-06-14 13:12:53,620 INFO L231 Difference]: Finished difference. Result has 73 places, 0 transitions, 0 flow [2024-06-14 13:12:53,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=73, PETRI_TRANSITIONS=0} [2024-06-14 13:12:53,620 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-14 13:12:53,620 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 0 transitions, 0 flow [2024-06-14 13:12:53,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:53,623 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-14 13:12:53,633 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-14 13:12:53,633 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-14 13:12:53,637 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-14 13:12:53,638 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-14 13:12:53,638 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-14 13:12:53,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 13:12:53,638 INFO L445 BasicCegarLoop]: Path program histogram: [15, 15, 13, 10, 10, 9, 7, 7, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:53,641 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-14 13:12:53,642 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-14 13:12:53,648 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-14 13:12:53,648 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-14 13:12:53,649 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.06 01:12:53 BasicIcfg [2024-06-14 13:12:53,649 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-14 13:12:53,650 INFO L158 Benchmark]: Toolchain (without parser) took 747773.47ms. Allocated memory was 182.5MB in the beginning and 3.5GB in the end (delta: 3.3GB). Free memory was 100.1MB in the beginning and 2.7GB in the end (delta: -2.6GB). Peak memory consumption was 741.2MB. Max. memory is 16.1GB. [2024-06-14 13:12:53,650 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 104.9MB. Free memory is still 69.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-14 13:12:53,650 INFO L158 Benchmark]: Witness Parser took 0.21ms. Allocated memory is still 182.5MB. Free memory is still 112.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-14 13:12:53,650 INFO L158 Benchmark]: CACSL2BoogieTranslator took 880.70ms. Allocated memory is still 182.5MB. Free memory was 99.7MB in the beginning and 108.5MB in the end (delta: -8.8MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. [2024-06-14 13:12:53,651 INFO L158 Benchmark]: Boogie Procedure Inliner took 91.20ms. Allocated memory is still 182.5MB. Free memory was 108.5MB in the beginning and 104.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-14 13:12:53,651 INFO L158 Benchmark]: Boogie Preprocessor took 116.01ms. Allocated memory is still 182.5MB. Free memory was 104.3MB in the beginning and 99.4MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-14 13:12:53,651 INFO L158 Benchmark]: RCFGBuilder took 1338.09ms. Allocated memory is still 182.5MB. Free memory was 99.4MB in the beginning and 105.7MB in the end (delta: -6.3MB). Peak memory consumption was 61.2MB. Max. memory is 16.1GB. [2024-06-14 13:12:53,651 INFO L158 Benchmark]: TraceAbstraction took 745339.39ms. Allocated memory was 182.5MB in the beginning and 3.5GB in the end (delta: 3.3GB). Free memory was 104.6MB in the beginning and 2.7GB in the end (delta: -2.6GB). Peak memory consumption was 743.6MB. Max. memory is 16.1GB. [2024-06-14 13:12:53,653 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 104.9MB. Free memory is still 69.1MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.21ms. Allocated memory is still 182.5MB. Free memory is still 112.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 880.70ms. Allocated memory is still 182.5MB. Free memory was 99.7MB in the beginning and 108.5MB in the end (delta: -8.8MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 91.20ms. Allocated memory is still 182.5MB. Free memory was 108.5MB in the beginning and 104.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 116.01ms. Allocated memory is still 182.5MB. Free memory was 104.3MB in the beginning and 99.4MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1338.09ms. Allocated memory is still 182.5MB. Free memory was 99.4MB in the beginning and 105.7MB in the end (delta: -6.3MB). Peak memory consumption was 61.2MB. Max. memory is 16.1GB. * TraceAbstraction took 745339.39ms. Allocated memory was 182.5MB in the beginning and 3.5GB in the end (delta: 3.3GB). Free memory was 104.6MB in the beginning and 2.7GB in the end (delta: -2.6GB). Peak memory consumption was 743.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 851]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 853]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 854]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 66 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 745.2s, OverallIterations: 144, TraceHistogramMax: 1, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 301.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8650 SdHoareTripleChecker+Valid, 62.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7562 mSDsluCounter, 3426 SdHoareTripleChecker+Invalid, 55.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2561 mSDsCounter, 5609 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 56751 IncrementalHoareTripleChecker+Invalid, 62360 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5609 mSolverCounterUnsat, 865 mSDtfsCounter, 56751 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1765 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1757 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3048 ImplicationChecksByTransitivity, 182.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6064occurred in iteration=85, InterpolantAutomatonStates: 1312, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 439.9s InterpolantComputationTime, 3005 NumberOfCodeBlocks, 3005 NumberOfCodeBlocksAsserted, 144 NumberOfCheckSat, 2861 ConstructedInterpolants, 0 QuantifiedInterpolants, 337216 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 144 InterpolantComputations, 144 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-14 13:12:53,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE