./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe025_power.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe025_power.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/safe025_power.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe025_power.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-7724a2d-m [2024-06-28 04:23:51,016 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 04:23:51,083 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 04:23:51,089 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 04:23:51,090 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 04:23:51,113 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 04:23:51,113 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 04:23:51,114 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 04:23:51,114 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 04:23:51,117 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 04:23:51,117 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 04:23:51,118 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 04:23:51,118 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 04:23:51,119 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 04:23:51,120 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 04:23:51,120 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 04:23:51,120 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 04:23:51,120 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 04:23:51,120 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 04:23:51,121 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 04:23:51,122 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 04:23:51,122 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 04:23:51,122 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 04:23:51,122 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 04:23:51,122 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 04:23:51,123 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 04:23:51,123 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 04:23:51,123 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 04:23:51,123 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 04:23:51,124 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 04:23:51,124 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 04:23:51,125 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 04:23:51,125 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:23:51,125 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 04:23:51,125 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 04:23:51,125 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 04:23:51,125 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 04:23:51,126 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 04:23:51,126 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 04:23:51,126 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 04:23:51,126 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 04:23:51,126 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 04:23:51,126 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 04:23:51,127 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 04:23:51,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 04:23:51,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 04:23:51,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 04:23:51,355 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 04:23:51,356 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 04:23:51,357 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_power.i [2024-06-28 04:23:52,351 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 04:23:52,615 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 04:23:52,615 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_power.i [2024-06-28 04:23:52,628 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/128f217f0/a3db0bdee585429eabd09c9805457735/FLAGa067248f1 [2024-06-28 04:23:52,639 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/128f217f0/a3db0bdee585429eabd09c9805457735 [2024-06-28 04:23:52,641 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 04:23:52,644 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 04:23:52,645 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe025_power.yml/witness.yml [2024-06-28 04:23:52,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 04:23:52,794 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 04:23:52,795 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 04:23:52,795 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 04:23:52,798 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 04:23:52,799 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:23:52" (1/2) ... [2024-06-28 04:23:52,800 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73b28cd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:23:52, skipping insertion in model container [2024-06-28 04:23:52,801 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:23:52" (1/2) ... [2024-06-28 04:23:52,802 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@264e5a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:23:52, skipping insertion in model container [2024-06-28 04:23:52,802 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:23:52" (2/2) ... [2024-06-28 04:23:52,803 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73b28cd0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:23:52, skipping insertion in model container [2024-06-28 04:23:52,803 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:23:52" (2/2) ... [2024-06-28 04:23:52,804 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 04:23:52,937 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 04:23:52,939 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] ((((((((((((((((((((((((((((((((! multithreaded || ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2)) && ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) [2024-06-28 04:23:52,939 INFO L97 edCorrectnessWitness]: Location invariant before [L879-L879] ((((((((((((((((((((((((((((((((! multithreaded || ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2)) && ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) [2024-06-28 04:23:52,939 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] ((((((((((((((((((((((((((((((((! multithreaded || ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2)) && ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) [2024-06-28 04:23:52,939 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 04:23:52,940 INFO L106 edCorrectnessWitness]: ghost_update [L874-L874] multithreaded = 1; [2024-06-28 04:23:52,977 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 04:23:53,281 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:23:53,289 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 04:23:53,448 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:23:53,487 INFO L206 MainTranslator]: Completed translation [2024-06-28 04:23:53,488 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:23:53 WrapperNode [2024-06-28 04:23:53,488 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 04:23:53,488 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 04:23:53,489 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 04:23:53,489 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 04:23:53,493 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 28.06 04:23:53" (1/1) ... [2024-06-28 04:23:53,507 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 28.06 04:23:53" (1/1) ... [2024-06-28 04:23:53,544 INFO L138 Inliner]: procedures = 175, calls = 111, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 342 [2024-06-28 04:23:53,545 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 04:23:53,545 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 04:23:53,545 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 04:23:53,546 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 04:23:53,558 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:23:53" (1/1) ... [2024-06-28 04:23:53,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:23:53" (1/1) ... [2024-06-28 04:23:53,565 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:23:53" (1/1) ... [2024-06-28 04:23:53,594 INFO L175 MemorySlicer]: Split 66 memory accesses to 2 slices as follows [2, 64]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 9 writes are split as follows [0, 9]. [2024-06-28 04:23:53,594 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:23:53" (1/1) ... [2024-06-28 04:23:53,594 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:23:53" (1/1) ... [2024-06-28 04:23:53,605 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:23:53" (1/1) ... [2024-06-28 04:23:53,608 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:23:53" (1/1) ... [2024-06-28 04:23:53,638 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:23:53" (1/1) ... [2024-06-28 04:23:53,640 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:23:53" (1/1) ... [2024-06-28 04:23:53,644 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 04:23:53,644 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 04:23:53,644 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 04:23:53,644 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 04:23:53,645 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:23:53" (1/1) ... [2024-06-28 04:23:53,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:23:53,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 04:23:53,674 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) [2024-06-28 04:23:53,683 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 [2024-06-28 04:23:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 04:23:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 04:23:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 04:23:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 04:23:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 04:23:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 04:23:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 04:23:53,708 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 04:23:53,708 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 04:23:53,708 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 04:23:53,708 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 04:23:53,708 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 04:23:53,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 04:23:53,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 04:23:53,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 04:23:53,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 04:23:53,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 04:23:53,713 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 04:23:53,826 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 04:23:53,828 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 04:23:54,362 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 04:23:54,362 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 04:23:54,867 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 04:23:54,868 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 04:23:54,868 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:23:54 BoogieIcfgContainer [2024-06-28 04:23:54,868 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 04:23:54,871 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 04:23:54,871 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 04:23:54,873 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 04:23:54,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 04:23:52" (1/4) ... [2024-06-28 04:23:54,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b60cd90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 04:23:54, skipping insertion in model container [2024-06-28 04:23:54,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:23:52" (2/4) ... [2024-06-28 04:23:54,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b60cd90 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 04:23:54, skipping insertion in model container [2024-06-28 04:23:54,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:23:53" (3/4) ... [2024-06-28 04:23:54,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b60cd90 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 04:23:54, skipping insertion in model container [2024-06-28 04:23:54,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:23:54" (4/4) ... [2024-06-28 04:23:54,876 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_power.i [2024-06-28 04:23:54,890 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 04:23:54,890 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 04:23:54,890 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 04:23:54,953 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 04:23:54,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-28 04:23:55,043 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-28 04:23:55,045 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:23:55,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 04:23:55,048 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-28 04:23:55,051 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-28 04:23:55,061 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 04:23:55,067 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;@30171cae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 04:23:55,068 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 04:23:55,073 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 04:23:55,073 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 04:23:55,073 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:23:55,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:55,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 04:23:55,074 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)] === [2024-06-28 04:23:55,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:55,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1085515767, now seen corresponding path program 1 times [2024-06-28 04:23:55,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:55,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277428477] [2024-06-28 04:23:55,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:55,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:56,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:56,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277428477] [2024-06-28 04:23:56,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277428477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:56,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:56,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 04:23:56,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557542309] [2024-06-28 04:23:56,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:56,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 04:23:56,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:56,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 04:23:56,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 04:23:56,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 04:23:56,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:56,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:56,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 04:23:56,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:57,390 INFO L124 PetriNetUnfolderBase]: 1205/1912 cut-off events. [2024-06-28 04:23:57,390 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-28 04:23:57,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3817 conditions, 1912 events. 1205/1912 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9443 event pairs, 800 based on Foata normal form. 1/1877 useless extension candidates. Maximal degree in co-relation 3805. Up to 1818 conditions per place. [2024-06-28 04:23:57,405 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 35 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-28 04:23:57,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 185 flow [2024-06-28 04:23:57,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 04:23:57,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 04:23:57,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-28 04:23:57,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-28 04:23:57,417 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 72 transitions. [2024-06-28 04:23:57,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 185 flow [2024-06-28 04:23:57,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 180 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 04:23:57,423 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-28 04:23:57,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-28 04:23:57,427 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-28 04:23:57,427 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-28 04:23:57,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:57,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:57,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:57,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 04:23:57,428 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)] === [2024-06-28 04:23:57,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:57,430 INFO L85 PathProgramCache]: Analyzing trace with hash -495377294, now seen corresponding path program 1 times [2024-06-28 04:23:57,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:57,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677074257] [2024-06-28 04:23:57,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:57,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:58,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:58,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:58,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677074257] [2024-06-28 04:23:58,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677074257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:58,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:58,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 04:23:58,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756977211] [2024-06-28 04:23:58,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:58,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 04:23:58,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:58,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 04:23:58,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 04:23:58,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:23:58,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:58,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:58,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:23:58,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:59,269 INFO L124 PetriNetUnfolderBase]: 1400/2131 cut-off events. [2024-06-28 04:23:59,269 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-06-28 04:23:59,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4875 conditions, 2131 events. 1400/2131 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10169 event pairs, 654 based on Foata normal form. 6/2135 useless extension candidates. Maximal degree in co-relation 4863. Up to 2059 conditions per place. [2024-06-28 04:23:59,278 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-28 04:23:59,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 266 flow [2024-06-28 04:23:59,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 04:23:59,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 04:23:59,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-28 04:23:59,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-06-28 04:23:59,280 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 92 transitions. [2024-06-28 04:23:59,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 266 flow [2024-06-28 04:23:59,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 04:23:59,283 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-28 04:23:59,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-28 04:23:59,284 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-28 04:23:59,284 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-28 04:23:59,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:59,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:59,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:59,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 04:23:59,285 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)] === [2024-06-28 04:23:59,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:59,285 INFO L85 PathProgramCache]: Analyzing trace with hash 36094320, now seen corresponding path program 1 times [2024-06-28 04:23:59,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:59,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621376386] [2024-06-28 04:23:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:59,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:01,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:01,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621376386] [2024-06-28 04:24:01,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621376386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:01,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:01,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:24:01,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24765366] [2024-06-28 04:24:01,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:01,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:24:01,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:01,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:24:01,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:24:01,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:24:01,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:01,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:01,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:24:01,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:02,069 INFO L124 PetriNetUnfolderBase]: 1391/2116 cut-off events. [2024-06-28 04:24:02,069 INFO L125 PetriNetUnfolderBase]: For 1120/1120 co-relation queries the response was YES. [2024-06-28 04:24:02,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5383 conditions, 2116 events. 1391/2116 cut-off events. For 1120/1120 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10076 event pairs, 485 based on Foata normal form. 6/2120 useless extension candidates. Maximal degree in co-relation 5369. Up to 2006 conditions per place. [2024-06-28 04:24:02,079 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-28 04:24:02,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 384 flow [2024-06-28 04:24:02,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:24:02,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:24:02,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-28 04:24:02,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-28 04:24:02,082 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 128 transitions. [2024-06-28 04:24:02,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 384 flow [2024-06-28 04:24:02,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 364 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 04:24:02,084 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-28 04:24:02,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-28 04:24:02,085 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-28 04:24:02,085 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-28 04:24:02,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:02,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:02,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:02,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 04:24:02,086 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)] === [2024-06-28 04:24:02,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:02,086 INFO L85 PathProgramCache]: Analyzing trace with hash -991970893, now seen corresponding path program 1 times [2024-06-28 04:24:02,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:02,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181714567] [2024-06-28 04:24:02,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:02,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:03,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:03,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181714567] [2024-06-28 04:24:03,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181714567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:03,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:03,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:24:03,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090592905] [2024-06-28 04:24:03,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:03,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:24:03,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:03,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:24:03,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:24:03,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:24:03,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:03,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:03,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:24:03,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:03,849 INFO L124 PetriNetUnfolderBase]: 1179/1872 cut-off events. [2024-06-28 04:24:03,850 INFO L125 PetriNetUnfolderBase]: For 1833/1833 co-relation queries the response was YES. [2024-06-28 04:24:03,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5172 conditions, 1872 events. 1179/1872 cut-off events. For 1833/1833 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9184 event pairs, 492 based on Foata normal form. 2/1872 useless extension candidates. Maximal degree in co-relation 5155. Up to 1767 conditions per place. [2024-06-28 04:24:03,860 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 47 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-28 04:24:03,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 341 flow [2024-06-28 04:24:03,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:24:03,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:24:03,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-28 04:24:03,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-28 04:24:03,863 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 94 transitions. [2024-06-28 04:24:03,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 341 flow [2024-06-28 04:24:03,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 314 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 04:24:03,868 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 200 flow [2024-06-28 04:24:03,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-28 04:24:03,869 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-28 04:24:03,869 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 200 flow [2024-06-28 04:24:03,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:03,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:03,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:03,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 04:24:03,870 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)] === [2024-06-28 04:24:03,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:03,871 INFO L85 PathProgramCache]: Analyzing trace with hash -686324679, now seen corresponding path program 1 times [2024-06-28 04:24:03,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:03,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612677887] [2024-06-28 04:24:03,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:03,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:03,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:03,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:03,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612677887] [2024-06-28 04:24:03,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612677887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:03,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:03,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 04:24:03,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860468070] [2024-06-28 04:24:03,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:03,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 04:24:03,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:03,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 04:24:03,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 04:24:03,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-28 04:24:03,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:03,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:03,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-28 04:24:03,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:04,331 INFO L124 PetriNetUnfolderBase]: 717/1268 cut-off events. [2024-06-28 04:24:04,332 INFO L125 PetriNetUnfolderBase]: For 1668/1700 co-relation queries the response was YES. [2024-06-28 04:24:04,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3624 conditions, 1268 events. 717/1268 cut-off events. For 1668/1700 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7190 event pairs, 322 based on Foata normal form. 107/1304 useless extension candidates. Maximal degree in co-relation 3606. Up to 776 conditions per place. [2024-06-28 04:24:04,339 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 34 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-06-28 04:24:04,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 339 flow [2024-06-28 04:24:04,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 04:24:04,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 04:24:04,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-06-28 04:24:04,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-28 04:24:04,341 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 200 flow. Second operand 3 states and 78 transitions. [2024-06-28 04:24:04,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 339 flow [2024-06-28 04:24:04,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 59 transitions, 320 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 04:24:04,343 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 235 flow [2024-06-28 04:24:04,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=235, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-06-28 04:24:04,344 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-28 04:24:04,344 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 235 flow [2024-06-28 04:24:04,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:04,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:04,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:04,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 04:24:04,345 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)] === [2024-06-28 04:24:04,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:04,345 INFO L85 PathProgramCache]: Analyzing trace with hash 198527316, now seen corresponding path program 1 times [2024-06-28 04:24:04,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:04,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574203010] [2024-06-28 04:24:04,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:04,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:05,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:05,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574203010] [2024-06-28 04:24:05,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574203010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:05,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:05,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:24:05,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304002744] [2024-06-28 04:24:05,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:05,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:24:05,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:05,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:24:05,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:24:05,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:05,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 235 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:05,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:05,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:05,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:06,597 INFO L124 PetriNetUnfolderBase]: 1519/2370 cut-off events. [2024-06-28 04:24:06,598 INFO L125 PetriNetUnfolderBase]: For 5035/5035 co-relation queries the response was YES. [2024-06-28 04:24:06,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7812 conditions, 2370 events. 1519/2370 cut-off events. For 5035/5035 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11936 event pairs, 667 based on Foata normal form. 4/2372 useless extension candidates. Maximal degree in co-relation 7794. Up to 2277 conditions per place. [2024-06-28 04:24:06,610 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 61 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2024-06-28 04:24:06,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 78 transitions, 480 flow [2024-06-28 04:24:06,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:24:06,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:24:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-28 04:24:06,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-28 04:24:06,613 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 235 flow. Second operand 6 states and 111 transitions. [2024-06-28 04:24:06,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 78 transitions, 480 flow [2024-06-28 04:24:06,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 78 transitions, 462 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-28 04:24:06,620 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 297 flow [2024-06-28 04:24:06,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-28 04:24:06,623 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-28 04:24:06,623 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 297 flow [2024-06-28 04:24:06,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:06,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:06,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:06,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 04:24:06,624 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)] === [2024-06-28 04:24:06,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:06,624 INFO L85 PathProgramCache]: Analyzing trace with hash 198764466, now seen corresponding path program 2 times [2024-06-28 04:24:06,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:06,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789111886] [2024-06-28 04:24:06,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:06,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:08,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:08,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789111886] [2024-06-28 04:24:08,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789111886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:08,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:08,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:24:08,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103621072] [2024-06-28 04:24:08,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:08,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:24:08,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:08,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:24:08,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:24:08,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:08,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:08,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:08,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:08,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:08,772 INFO L124 PetriNetUnfolderBase]: 1511/2351 cut-off events. [2024-06-28 04:24:08,773 INFO L125 PetriNetUnfolderBase]: For 6082/6082 co-relation queries the response was YES. [2024-06-28 04:24:08,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8124 conditions, 2351 events. 1511/2351 cut-off events. For 6082/6082 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11835 event pairs, 674 based on Foata normal form. 4/2350 useless extension candidates. Maximal degree in co-relation 8103. Up to 2232 conditions per place. [2024-06-28 04:24:08,788 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 57 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2024-06-28 04:24:08,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 541 flow [2024-06-28 04:24:08,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:24:08,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:24:08,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-28 04:24:08,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-28 04:24:08,789 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 297 flow. Second operand 6 states and 110 transitions. [2024-06-28 04:24:08,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 541 flow [2024-06-28 04:24:08,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 502 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 04:24:08,793 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 351 flow [2024-06-28 04:24:08,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=351, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-06-28 04:24:08,794 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-28 04:24:08,794 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 351 flow [2024-06-28 04:24:08,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:08,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:08,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:08,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 04:24:08,794 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)] === [2024-06-28 04:24:08,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:08,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1668742389, now seen corresponding path program 1 times [2024-06-28 04:24:08,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:08,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489219135] [2024-06-28 04:24:08,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:08,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:10,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:10,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489219135] [2024-06-28 04:24:10,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489219135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:10,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:10,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:24:10,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500617819] [2024-06-28 04:24:10,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:10,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:24:10,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:10,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:24:10,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:24:10,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:10,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 351 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:10,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:10,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:10,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:11,569 INFO L124 PetriNetUnfolderBase]: 1548/2427 cut-off events. [2024-06-28 04:24:11,569 INFO L125 PetriNetUnfolderBase]: For 8302/8302 co-relation queries the response was YES. [2024-06-28 04:24:11,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8932 conditions, 2427 events. 1548/2427 cut-off events. For 8302/8302 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12269 event pairs, 665 based on Foata normal form. 2/2427 useless extension candidates. Maximal degree in co-relation 8910. Up to 2313 conditions per place. [2024-06-28 04:24:11,585 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 80 selfloop transitions, 18 changer transitions 0/103 dead transitions. [2024-06-28 04:24:11,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 103 transitions, 704 flow [2024-06-28 04:24:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:24:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:24:11,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:24:11,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-28 04:24:11,589 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 351 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:24:11,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 103 transitions, 704 flow [2024-06-28 04:24:11,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 103 transitions, 641 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-28 04:24:11,595 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 424 flow [2024-06-28 04:24:11,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=424, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-28 04:24:11,598 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-28 04:24:11,598 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 424 flow [2024-06-28 04:24:11,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:11,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:11,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:11,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 04:24:11,599 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)] === [2024-06-28 04:24:11,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:11,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1707950343, now seen corresponding path program 2 times [2024-06-28 04:24:11,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:11,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244465315] [2024-06-28 04:24:11,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:11,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:13,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:13,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244465315] [2024-06-28 04:24:13,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244465315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:13,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:13,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:24:13,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622040971] [2024-06-28 04:24:13,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:13,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:24:13,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:13,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:24:13,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:24:13,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:13,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 424 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:13,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:13,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:13,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:14,497 INFO L124 PetriNetUnfolderBase]: 1545/2422 cut-off events. [2024-06-28 04:24:14,497 INFO L125 PetriNetUnfolderBase]: For 10269/10269 co-relation queries the response was YES. [2024-06-28 04:24:14,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9356 conditions, 2422 events. 1545/2422 cut-off events. For 10269/10269 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12244 event pairs, 664 based on Foata normal form. 2/2422 useless extension candidates. Maximal degree in co-relation 9331. Up to 2278 conditions per place. [2024-06-28 04:24:14,507 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 75 selfloop transitions, 21 changer transitions 0/101 dead transitions. [2024-06-28 04:24:14,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 101 transitions, 732 flow [2024-06-28 04:24:14,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:24:14,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:24:14,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-28 04:24:14,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 04:24:14,508 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 424 flow. Second operand 7 states and 129 transitions. [2024-06-28 04:24:14,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 101 transitions, 732 flow [2024-06-28 04:24:14,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 101 transitions, 689 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 04:24:14,515 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 465 flow [2024-06-28 04:24:14,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=465, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-06-28 04:24:14,518 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-28 04:24:14,518 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 465 flow [2024-06-28 04:24:14,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:14,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:14,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:14,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 04:24:14,519 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:14,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:14,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1571074650, now seen corresponding path program 1 times [2024-06-28 04:24:14,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:14,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307390522] [2024-06-28 04:24:14,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:14,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:16,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:16,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307390522] [2024-06-28 04:24:16,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307390522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:16,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:16,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:24:16,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200945134] [2024-06-28 04:24:16,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:16,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:24:16,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:16,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:24:16,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:24:16,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:24:16,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 465 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:16,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:16,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:24:16,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:16,918 INFO L124 PetriNetUnfolderBase]: 1289/2078 cut-off events. [2024-06-28 04:24:16,918 INFO L125 PetriNetUnfolderBase]: For 10671/10671 co-relation queries the response was YES. [2024-06-28 04:24:16,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8387 conditions, 2078 events. 1289/2078 cut-off events. For 10671/10671 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10679 event pairs, 524 based on Foata normal form. 2/2078 useless extension candidates. Maximal degree in co-relation 8361. Up to 1982 conditions per place. [2024-06-28 04:24:16,928 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 70 selfloop transitions, 8 changer transitions 0/84 dead transitions. [2024-06-28 04:24:16,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 84 transitions, 671 flow [2024-06-28 04:24:16,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:24:16,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:24:16,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-28 04:24:16,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-28 04:24:16,930 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 465 flow. Second operand 5 states and 90 transitions. [2024-06-28 04:24:16,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 84 transitions, 671 flow [2024-06-28 04:24:16,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 84 transitions, 609 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 04:24:16,936 INFO L231 Difference]: Finished difference. Result has 69 places, 73 transitions, 449 flow [2024-06-28 04:24:16,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=449, PETRI_PLACES=69, PETRI_TRANSITIONS=73} [2024-06-28 04:24:16,937 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-28 04:24:16,937 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 73 transitions, 449 flow [2024-06-28 04:24:16,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:16,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:16,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:16,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 04:24:16,938 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)] === [2024-06-28 04:24:16,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:16,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1412361543, now seen corresponding path program 1 times [2024-06-28 04:24:16,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:16,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523095546] [2024-06-28 04:24:16,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:16,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:17,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:17,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523095546] [2024-06-28 04:24:17,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523095546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:17,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:17,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:24:17,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936895312] [2024-06-28 04:24:17,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:17,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:24:17,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:17,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:24:17,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:24:17,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-28 04:24:17,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 73 transitions, 449 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:17,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:17,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-28 04:24:17,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:17,388 INFO L124 PetriNetUnfolderBase]: 814/1489 cut-off events. [2024-06-28 04:24:17,389 INFO L125 PetriNetUnfolderBase]: For 7899/7992 co-relation queries the response was YES. [2024-06-28 04:24:17,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5821 conditions, 1489 events. 814/1489 cut-off events. For 7899/7992 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8617 event pairs, 306 based on Foata normal form. 87/1496 useless extension candidates. Maximal degree in co-relation 5794. Up to 728 conditions per place. [2024-06-28 04:24:17,398 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 37 selfloop transitions, 24 changer transitions 0/81 dead transitions. [2024-06-28 04:24:17,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 81 transitions, 603 flow [2024-06-28 04:24:17,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:24:17,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:24:17,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-28 04:24:17,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-28 04:24:17,400 INFO L175 Difference]: Start difference. First operand has 69 places, 73 transitions, 449 flow. Second operand 5 states and 101 transitions. [2024-06-28 04:24:17,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 81 transitions, 603 flow [2024-06-28 04:24:17,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 81 transitions, 581 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 04:24:17,405 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 497 flow [2024-06-28 04:24:17,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=497, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-28 04:24:17,406 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-28 04:24:17,406 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 497 flow [2024-06-28 04:24:17,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:17,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:17,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:17,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 04:24:17,407 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)] === [2024-06-28 04:24:17,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:17,407 INFO L85 PathProgramCache]: Analyzing trace with hash -831628714, now seen corresponding path program 1 times [2024-06-28 04:24:17,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:17,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435093323] [2024-06-28 04:24:17,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:17,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:19,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:19,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435093323] [2024-06-28 04:24:19,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435093323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:19,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:19,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:24:19,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169601359] [2024-06-28 04:24:19,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:19,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:24:19,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:19,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:24:19,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:24:19,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:19,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 497 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 04:24:19,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:19,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:19,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:19,982 INFO L124 PetriNetUnfolderBase]: 1483/2377 cut-off events. [2024-06-28 04:24:19,982 INFO L125 PetriNetUnfolderBase]: For 13081/13081 co-relation queries the response was YES. [2024-06-28 04:24:19,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10019 conditions, 2377 events. 1483/2377 cut-off events. For 13081/13081 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12306 event pairs, 526 based on Foata normal form. 4/2379 useless extension candidates. Maximal degree in co-relation 9991. Up to 2143 conditions per place. [2024-06-28 04:24:19,995 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 93 selfloop transitions, 24 changer transitions 0/122 dead transitions. [2024-06-28 04:24:19,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 122 transitions, 893 flow [2024-06-28 04:24:19,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:24:19,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:24:19,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 04:24:19,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-28 04:24:19,997 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 497 flow. Second operand 9 states and 163 transitions. [2024-06-28 04:24:19,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 122 transitions, 893 flow [2024-06-28 04:24:20,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 122 transitions, 890 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-28 04:24:20,006 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 602 flow [2024-06-28 04:24:20,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=602, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2024-06-28 04:24:20,007 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2024-06-28 04:24:20,007 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 602 flow [2024-06-28 04:24:20,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 04:24:20,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:20,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:20,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 04:24:20,007 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)] === [2024-06-28 04:24:20,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:20,008 INFO L85 PathProgramCache]: Analyzing trace with hash -601734238, now seen corresponding path program 2 times [2024-06-28 04:24:20,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:20,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302890572] [2024-06-28 04:24:20,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:20,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:21,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:21,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302890572] [2024-06-28 04:24:21,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302890572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:21,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:21,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:24:21,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598263716] [2024-06-28 04:24:21,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:21,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:24:21,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:21,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:24:21,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:24:22,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:22,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 602 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 04:24:22,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:22,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:22,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:23,067 INFO L124 PetriNetUnfolderBase]: 1491/2397 cut-off events. [2024-06-28 04:24:23,068 INFO L125 PetriNetUnfolderBase]: For 15726/15726 co-relation queries the response was YES. [2024-06-28 04:24:23,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10516 conditions, 2397 events. 1491/2397 cut-off events. For 15726/15726 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12454 event pairs, 534 based on Foata normal form. 4/2399 useless extension candidates. Maximal degree in co-relation 10485. Up to 2135 conditions per place. [2024-06-28 04:24:23,079 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 88 selfloop transitions, 23 changer transitions 0/116 dead transitions. [2024-06-28 04:24:23,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 116 transitions, 961 flow [2024-06-28 04:24:23,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:24:23,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:24:23,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:24:23,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-28 04:24:23,081 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 602 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:24:23,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 116 transitions, 961 flow [2024-06-28 04:24:23,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 116 transitions, 901 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 04:24:23,095 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 621 flow [2024-06-28 04:24:23,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=621, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-06-28 04:24:23,096 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-28 04:24:23,096 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 621 flow [2024-06-28 04:24:23,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 04:24:23,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:23,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:23,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 04:24:23,096 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)] === [2024-06-28 04:24:23,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:23,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1291230894, now seen corresponding path program 3 times [2024-06-28 04:24:23,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:23,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450432738] [2024-06-28 04:24:23,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:23,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:25,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:25,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450432738] [2024-06-28 04:24:25,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450432738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:25,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:25,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:24:25,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738983010] [2024-06-28 04:24:25,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:25,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:24:25,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:25,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:24:25,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:24:25,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:25,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 621 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 04:24:25,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:25,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:25,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:26,156 INFO L124 PetriNetUnfolderBase]: 1487/2389 cut-off events. [2024-06-28 04:24:26,156 INFO L125 PetriNetUnfolderBase]: For 17742/17742 co-relation queries the response was YES. [2024-06-28 04:24:26,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10662 conditions, 2389 events. 1487/2389 cut-off events. For 17742/17742 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12443 event pairs, 666 based on Foata normal form. 4/2391 useless extension candidates. Maximal degree in co-relation 10630. Up to 2201 conditions per place. [2024-06-28 04:24:26,171 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 88 selfloop transitions, 22 changer transitions 0/115 dead transitions. [2024-06-28 04:24:26,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 115 transitions, 953 flow [2024-06-28 04:24:26,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:24:26,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:24:26,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 04:24:26,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-28 04:24:26,173 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 621 flow. Second operand 8 states and 144 transitions. [2024-06-28 04:24:26,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 115 transitions, 953 flow [2024-06-28 04:24:26,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 115 transitions, 891 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 04:24:26,189 INFO L231 Difference]: Finished difference. Result has 83 places, 79 transitions, 610 flow [2024-06-28 04:24:26,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=610, PETRI_PLACES=83, PETRI_TRANSITIONS=79} [2024-06-28 04:24:26,190 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-28 04:24:26,190 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 79 transitions, 610 flow [2024-06-28 04:24:26,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 04:24:26,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:26,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:26,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 04:24:26,191 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)] === [2024-06-28 04:24:26,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:26,191 INFO L85 PathProgramCache]: Analyzing trace with hash -919240066, now seen corresponding path program 4 times [2024-06-28 04:24:26,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:26,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809685438] [2024-06-28 04:24:26,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:26,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:28,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:28,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809685438] [2024-06-28 04:24:28,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809685438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:28,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:28,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:24:28,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876403115] [2024-06-28 04:24:28,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:28,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:24:28,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:28,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:24:28,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:24:28,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:28,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 79 transitions, 610 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 04:24:28,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:28,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:28,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:29,288 INFO L124 PetriNetUnfolderBase]: 1495/2409 cut-off events. [2024-06-28 04:24:29,288 INFO L125 PetriNetUnfolderBase]: For 17748/17748 co-relation queries the response was YES. [2024-06-28 04:24:29,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10723 conditions, 2409 events. 1495/2409 cut-off events. For 17748/17748 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12602 event pairs, 666 based on Foata normal form. 4/2411 useless extension candidates. Maximal degree in co-relation 10690. Up to 2255 conditions per place. [2024-06-28 04:24:29,301 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 93 selfloop transitions, 16 changer transitions 0/114 dead transitions. [2024-06-28 04:24:29,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 114 transitions, 955 flow [2024-06-28 04:24:29,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:24:29,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:24:29,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 04:24:29,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-28 04:24:29,303 INFO L175 Difference]: Start difference. First operand has 83 places, 79 transitions, 610 flow. Second operand 8 states and 139 transitions. [2024-06-28 04:24:29,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 114 transitions, 955 flow [2024-06-28 04:24:29,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 114 transitions, 898 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 04:24:29,319 INFO L231 Difference]: Finished difference. Result has 86 places, 81 transitions, 622 flow [2024-06-28 04:24:29,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=622, PETRI_PLACES=86, PETRI_TRANSITIONS=81} [2024-06-28 04:24:29,319 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 42 predicate places. [2024-06-28 04:24:29,320 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 81 transitions, 622 flow [2024-06-28 04:24:29,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 04:24:29,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:29,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:29,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 04:24:29,320 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:29,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:29,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1259484001, now seen corresponding path program 1 times [2024-06-28 04:24:29,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:29,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804408575] [2024-06-28 04:24:29,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:29,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:29,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:31,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:31,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804408575] [2024-06-28 04:24:31,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804408575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:31,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:31,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:24:31,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417135694] [2024-06-28 04:24:31,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:31,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:24:31,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:31,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:24:31,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:24:31,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:31,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 81 transitions, 622 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:31,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:31,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:31,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:32,271 INFO L124 PetriNetUnfolderBase]: 1505/2424 cut-off events. [2024-06-28 04:24:32,271 INFO L125 PetriNetUnfolderBase]: For 20054/20054 co-relation queries the response was YES. [2024-06-28 04:24:32,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11011 conditions, 2424 events. 1505/2424 cut-off events. For 20054/20054 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12728 event pairs, 653 based on Foata normal form. 2/2424 useless extension candidates. Maximal degree in co-relation 10976. Up to 2261 conditions per place. [2024-06-28 04:24:32,286 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 83 selfloop transitions, 23 changer transitions 0/111 dead transitions. [2024-06-28 04:24:32,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 111 transitions, 995 flow [2024-06-28 04:24:32,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:24:32,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:24:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-28 04:24:32,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-28 04:24:32,287 INFO L175 Difference]: Start difference. First operand has 86 places, 81 transitions, 622 flow. Second operand 6 states and 110 transitions. [2024-06-28 04:24:32,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 111 transitions, 995 flow [2024-06-28 04:24:32,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 111 transitions, 951 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 04:24:32,304 INFO L231 Difference]: Finished difference. Result has 88 places, 90 transitions, 718 flow [2024-06-28 04:24:32,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=718, PETRI_PLACES=88, PETRI_TRANSITIONS=90} [2024-06-28 04:24:32,305 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-28 04:24:32,305 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 90 transitions, 718 flow [2024-06-28 04:24:32,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:32,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:32,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:32,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 04:24:32,306 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:32,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:32,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1433498578, now seen corresponding path program 5 times [2024-06-28 04:24:32,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:32,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456621536] [2024-06-28 04:24:32,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:32,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:34,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:34,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456621536] [2024-06-28 04:24:34,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456621536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:34,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:34,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:24:34,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301326135] [2024-06-28 04:24:34,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:34,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:24:34,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:34,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:24:34,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:24:34,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:34,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 90 transitions, 718 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 04:24:34,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:34,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:34,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:35,380 INFO L124 PetriNetUnfolderBase]: 1501/2420 cut-off events. [2024-06-28 04:24:35,380 INFO L125 PetriNetUnfolderBase]: For 23573/23573 co-relation queries the response was YES. [2024-06-28 04:24:35,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11518 conditions, 2420 events. 1501/2420 cut-off events. For 23573/23573 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12695 event pairs, 660 based on Foata normal form. 4/2417 useless extension candidates. Maximal degree in co-relation 11481. Up to 2228 conditions per place. [2024-06-28 04:24:35,394 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 95 selfloop transitions, 20 changer transitions 0/120 dead transitions. [2024-06-28 04:24:35,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 120 transitions, 1028 flow [2024-06-28 04:24:35,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:24:35,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:24:35,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:24:35,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 04:24:35,396 INFO L175 Difference]: Start difference. First operand has 88 places, 90 transitions, 718 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:24:35,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 120 transitions, 1028 flow [2024-06-28 04:24:35,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 120 transitions, 1010 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-28 04:24:35,414 INFO L231 Difference]: Finished difference. Result has 95 places, 90 transitions, 733 flow [2024-06-28 04:24:35,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=733, PETRI_PLACES=95, PETRI_TRANSITIONS=90} [2024-06-28 04:24:35,415 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-28 04:24:35,415 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 90 transitions, 733 flow [2024-06-28 04:24:35,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 04:24:35,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:35,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:35,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 04:24:35,416 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:35,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:35,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1271864161, now seen corresponding path program 2 times [2024-06-28 04:24:35,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:35,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625681769] [2024-06-28 04:24:35,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:35,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:37,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:37,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625681769] [2024-06-28 04:24:37,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625681769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:37,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:37,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:24:37,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595653797] [2024-06-28 04:24:37,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:37,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:24:37,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:37,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:24:37,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:24:37,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:37,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 90 transitions, 733 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:37,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:37,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:37,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:38,201 INFO L124 PetriNetUnfolderBase]: 1495/2402 cut-off events. [2024-06-28 04:24:38,202 INFO L125 PetriNetUnfolderBase]: For 26368/26368 co-relation queries the response was YES. [2024-06-28 04:24:38,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11762 conditions, 2402 events. 1495/2402 cut-off events. For 26368/26368 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12527 event pairs, 665 based on Foata normal form. 2/2393 useless extension candidates. Maximal degree in co-relation 11721. Up to 2248 conditions per place. [2024-06-28 04:24:38,215 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 74 selfloop transitions, 23 changer transitions 0/102 dead transitions. [2024-06-28 04:24:38,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 102 transitions, 967 flow [2024-06-28 04:24:38,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:24:38,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:24:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-28 04:24:38,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39147286821705424 [2024-06-28 04:24:38,217 INFO L175 Difference]: Start difference. First operand has 95 places, 90 transitions, 733 flow. Second operand 6 states and 101 transitions. [2024-06-28 04:24:38,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 102 transitions, 967 flow [2024-06-28 04:24:38,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 102 transitions, 899 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 04:24:38,234 INFO L231 Difference]: Finished difference. Result has 96 places, 90 transitions, 717 flow [2024-06-28 04:24:38,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=717, PETRI_PLACES=96, PETRI_TRANSITIONS=90} [2024-06-28 04:24:38,235 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-28 04:24:38,235 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 90 transitions, 717 flow [2024-06-28 04:24:38,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:38,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:38,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:38,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 04:24:38,236 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:38,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:38,236 INFO L85 PathProgramCache]: Analyzing trace with hash -931197353, now seen corresponding path program 1 times [2024-06-28 04:24:38,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:38,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037135895] [2024-06-28 04:24:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:38,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:40,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:40,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037135895] [2024-06-28 04:24:40,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037135895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:40,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:40,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:24:40,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071902360] [2024-06-28 04:24:40,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:40,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:24:40,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:40,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:24:40,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:24:40,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:24:40,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 90 transitions, 717 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:40,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:40,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:24:40,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:41,239 INFO L124 PetriNetUnfolderBase]: 1346/2211 cut-off events. [2024-06-28 04:24:41,240 INFO L125 PetriNetUnfolderBase]: For 26196/26196 co-relation queries the response was YES. [2024-06-28 04:24:41,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10933 conditions, 2211 events. 1346/2211 cut-off events. For 26196/26196 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11810 event pairs, 544 based on Foata normal form. 2/2183 useless extension candidates. Maximal degree in co-relation 10891. Up to 2076 conditions per place. [2024-06-28 04:24:41,250 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 90 selfloop transitions, 10 changer transitions 0/109 dead transitions. [2024-06-28 04:24:41,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 109 transitions, 996 flow [2024-06-28 04:24:41,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:24:41,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:24:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-28 04:24:41,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-28 04:24:41,251 INFO L175 Difference]: Start difference. First operand has 96 places, 90 transitions, 717 flow. Second operand 6 states and 105 transitions. [2024-06-28 04:24:41,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 109 transitions, 996 flow [2024-06-28 04:24:41,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 109 transitions, 946 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 04:24:41,270 INFO L231 Difference]: Finished difference. Result has 98 places, 93 transitions, 724 flow [2024-06-28 04:24:41,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=724, PETRI_PLACES=98, PETRI_TRANSITIONS=93} [2024-06-28 04:24:41,270 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-28 04:24:41,270 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 93 transitions, 724 flow [2024-06-28 04:24:41,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:41,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:41,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:41,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 04:24:41,271 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:41,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:41,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1271871105, now seen corresponding path program 2 times [2024-06-28 04:24:41,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:41,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845388390] [2024-06-28 04:24:41,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:41,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:43,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:43,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845388390] [2024-06-28 04:24:43,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845388390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:43,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:43,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:24:43,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145721370] [2024-06-28 04:24:43,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:43,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:24:43,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:43,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:24:43,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:24:43,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:24:43,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 93 transitions, 724 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:43,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:43,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:24:43,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:44,037 INFO L124 PetriNetUnfolderBase]: 1509/2485 cut-off events. [2024-06-28 04:24:44,037 INFO L125 PetriNetUnfolderBase]: For 30907/30907 co-relation queries the response was YES. [2024-06-28 04:24:44,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12826 conditions, 2485 events. 1509/2485 cut-off events. For 30907/30907 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13657 event pairs, 442 based on Foata normal form. 5/2460 useless extension candidates. Maximal degree in co-relation 12783. Up to 1944 conditions per place. [2024-06-28 04:24:44,049 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 76 selfloop transitions, 41 changer transitions 0/126 dead transitions. [2024-06-28 04:24:44,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 126 transitions, 1161 flow [2024-06-28 04:24:44,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:24:44,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:24:44,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-28 04:24:44,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-28 04:24:44,050 INFO L175 Difference]: Start difference. First operand has 98 places, 93 transitions, 724 flow. Second operand 7 states and 127 transitions. [2024-06-28 04:24:44,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 126 transitions, 1161 flow [2024-06-28 04:24:44,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 126 transitions, 1131 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 04:24:44,073 INFO L231 Difference]: Finished difference. Result has 104 places, 106 transitions, 986 flow [2024-06-28 04:24:44,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=986, PETRI_PLACES=104, PETRI_TRANSITIONS=106} [2024-06-28 04:24:44,074 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-28 04:24:44,074 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 106 transitions, 986 flow [2024-06-28 04:24:44,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:44,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:44,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:44,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 04:24:44,074 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:44,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:44,075 INFO L85 PathProgramCache]: Analyzing trace with hash 389300365, now seen corresponding path program 1 times [2024-06-28 04:24:44,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:44,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618201818] [2024-06-28 04:24:44,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:44,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:46,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:46,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618201818] [2024-06-28 04:24:46,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618201818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:46,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:46,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:24:46,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082662487] [2024-06-28 04:24:46,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:46,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:24:46,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:46,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:24:46,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:24:46,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:46,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 106 transitions, 986 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:46,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:46,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:46,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:47,465 INFO L124 PetriNetUnfolderBase]: 1703/2752 cut-off events. [2024-06-28 04:24:47,465 INFO L125 PetriNetUnfolderBase]: For 43305/43305 co-relation queries the response was YES. [2024-06-28 04:24:47,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15993 conditions, 2752 events. 1703/2752 cut-off events. For 43305/43305 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14923 event pairs, 682 based on Foata normal form. 4/2754 useless extension candidates. Maximal degree in co-relation 15946. Up to 2528 conditions per place. [2024-06-28 04:24:47,484 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 100 selfloop transitions, 32 changer transitions 0/137 dead transitions. [2024-06-28 04:24:47,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 137 transitions, 1468 flow [2024-06-28 04:24:47,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:24:47,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:24:47,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-28 04:24:47,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-28 04:24:47,485 INFO L175 Difference]: Start difference. First operand has 104 places, 106 transitions, 986 flow. Second operand 7 states and 127 transitions. [2024-06-28 04:24:47,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 137 transitions, 1468 flow [2024-06-28 04:24:47,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 137 transitions, 1440 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-28 04:24:47,522 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 1120 flow [2024-06-28 04:24:47,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1120, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2024-06-28 04:24:47,523 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-28 04:24:47,523 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 1120 flow [2024-06-28 04:24:47,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:47,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:47,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:47,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 04:24:47,523 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:47,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:47,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1641616183, now seen corresponding path program 2 times [2024-06-28 04:24:47,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:47,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175664734] [2024-06-28 04:24:47,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:47,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:49,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:49,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175664734] [2024-06-28 04:24:49,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175664734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:49,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:49,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:24:49,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784239313] [2024-06-28 04:24:49,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:49,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:24:49,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:49,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:24:49,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:24:49,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:49,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 1120 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:49,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:49,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:49,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:50,855 INFO L124 PetriNetUnfolderBase]: 1723/2780 cut-off events. [2024-06-28 04:24:50,855 INFO L125 PetriNetUnfolderBase]: For 49900/49900 co-relation queries the response was YES. [2024-06-28 04:24:50,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16790 conditions, 2780 events. 1723/2780 cut-off events. For 49900/49900 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15074 event pairs, 687 based on Foata normal form. 4/2782 useless extension candidates. Maximal degree in co-relation 16741. Up to 2662 conditions per place. [2024-06-28 04:24:50,875 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 108 selfloop transitions, 16 changer transitions 0/129 dead transitions. [2024-06-28 04:24:50,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 129 transitions, 1469 flow [2024-06-28 04:24:50,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:24:50,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:24:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-28 04:24:50,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687707641196013 [2024-06-28 04:24:50,877 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 1120 flow. Second operand 7 states and 111 transitions. [2024-06-28 04:24:50,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 129 transitions, 1469 flow [2024-06-28 04:24:50,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 129 transitions, 1420 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-28 04:24:50,921 INFO L231 Difference]: Finished difference. Result has 113 places, 115 transitions, 1165 flow [2024-06-28 04:24:50,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1165, PETRI_PLACES=113, PETRI_TRANSITIONS=115} [2024-06-28 04:24:50,922 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-28 04:24:50,922 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 115 transitions, 1165 flow [2024-06-28 04:24:50,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:50,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:50,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:50,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 04:24:50,922 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:50,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:50,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1110398445, now seen corresponding path program 3 times [2024-06-28 04:24:50,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:50,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543380669] [2024-06-28 04:24:50,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:50,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:53,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:53,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543380669] [2024-06-28 04:24:53,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543380669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:53,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:53,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:24:53,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882104324] [2024-06-28 04:24:53,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:53,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:24:53,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:53,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:24:53,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:24:53,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:24:53,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 115 transitions, 1165 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:53,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:53,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:24:53,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:54,466 INFO L124 PetriNetUnfolderBase]: 1711/2752 cut-off events. [2024-06-28 04:24:54,466 INFO L125 PetriNetUnfolderBase]: For 53482/53482 co-relation queries the response was YES. [2024-06-28 04:24:54,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16845 conditions, 2752 events. 1711/2752 cut-off events. For 53482/53482 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14833 event pairs, 674 based on Foata normal form. 4/2745 useless extension candidates. Maximal degree in co-relation 16794. Up to 2536 conditions per place. [2024-06-28 04:24:54,482 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 92 selfloop transitions, 35 changer transitions 0/132 dead transitions. [2024-06-28 04:24:54,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 132 transitions, 1497 flow [2024-06-28 04:24:54,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:24:54,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:24:54,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 04:24:54,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 04:24:54,482 INFO L175 Difference]: Start difference. First operand has 113 places, 115 transitions, 1165 flow. Second operand 7 states and 119 transitions. [2024-06-28 04:24:54,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 132 transitions, 1497 flow [2024-06-28 04:24:54,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 132 transitions, 1401 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-28 04:24:54,516 INFO L231 Difference]: Finished difference. Result has 113 places, 115 transitions, 1145 flow [2024-06-28 04:24:54,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1145, PETRI_PLACES=113, PETRI_TRANSITIONS=115} [2024-06-28 04:24:54,517 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-28 04:24:54,517 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 115 transitions, 1145 flow [2024-06-28 04:24:54,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:54,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:54,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:54,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 04:24:54,517 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:54,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:54,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1197654941, now seen corresponding path program 1 times [2024-06-28 04:24:54,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:54,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709501135] [2024-06-28 04:24:54,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:54,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:57,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:57,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709501135] [2024-06-28 04:24:57,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709501135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:57,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:57,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:24:57,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583153786] [2024-06-28 04:24:57,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:57,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:24:57,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:57,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:24:57,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:24:57,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:24:57,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 115 transitions, 1145 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:57,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:57,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:24:57,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:58,122 INFO L124 PetriNetUnfolderBase]: 1520/2505 cut-off events. [2024-06-28 04:24:58,122 INFO L125 PetriNetUnfolderBase]: For 50764/50777 co-relation queries the response was YES. [2024-06-28 04:24:58,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15470 conditions, 2505 events. 1520/2505 cut-off events. For 50764/50777 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13785 event pairs, 518 based on Foata normal form. 15/2489 useless extension candidates. Maximal degree in co-relation 15420. Up to 2352 conditions per place. [2024-06-28 04:24:58,139 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 116 selfloop transitions, 15 changer transitions 0/140 dead transitions. [2024-06-28 04:24:58,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 140 transitions, 1546 flow [2024-06-28 04:24:58,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:24:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:24:58,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 04:24:58,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-28 04:24:58,140 INFO L175 Difference]: Start difference. First operand has 113 places, 115 transitions, 1145 flow. Second operand 7 states and 118 transitions. [2024-06-28 04:24:58,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 140 transitions, 1546 flow [2024-06-28 04:24:58,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 140 transitions, 1444 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 04:24:58,175 INFO L231 Difference]: Finished difference. Result has 115 places, 123 transitions, 1179 flow [2024-06-28 04:24:58,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1179, PETRI_PLACES=115, PETRI_TRANSITIONS=123} [2024-06-28 04:24:58,175 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-28 04:24:58,175 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 123 transitions, 1179 flow [2024-06-28 04:24:58,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:58,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:58,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:58,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 04:24:58,176 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:24:58,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:58,176 INFO L85 PathProgramCache]: Analyzing trace with hash 773546667, now seen corresponding path program 1 times [2024-06-28 04:24:58,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:58,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406575701] [2024-06-28 04:24:58,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:58,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:00,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:00,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406575701] [2024-06-28 04:25:00,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406575701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:00,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:00,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:00,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561064762] [2024-06-28 04:25:00,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:00,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:00,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:00,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:00,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:01,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:01,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 123 transitions, 1179 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:01,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:01,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:01,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:02,080 INFO L124 PetriNetUnfolderBase]: 1697/2749 cut-off events. [2024-06-28 04:25:02,080 INFO L125 PetriNetUnfolderBase]: For 60855/60855 co-relation queries the response was YES. [2024-06-28 04:25:02,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17385 conditions, 2749 events. 1697/2749 cut-off events. For 60855/60855 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14848 event pairs, 612 based on Foata normal form. 2/2749 useless extension candidates. Maximal degree in co-relation 17333. Up to 2637 conditions per place. [2024-06-28 04:25:02,101 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 118 selfloop transitions, 15 changer transitions 0/138 dead transitions. [2024-06-28 04:25:02,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 138 transitions, 1520 flow [2024-06-28 04:25:02,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:25:02,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:25:02,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-28 04:25:02,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36212624584717606 [2024-06-28 04:25:02,102 INFO L175 Difference]: Start difference. First operand has 115 places, 123 transitions, 1179 flow. Second operand 7 states and 109 transitions. [2024-06-28 04:25:02,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 138 transitions, 1520 flow [2024-06-28 04:25:02,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 138 transitions, 1472 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-28 04:25:02,151 INFO L231 Difference]: Finished difference. Result has 118 places, 125 transitions, 1207 flow [2024-06-28 04:25:02,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1207, PETRI_PLACES=118, PETRI_TRANSITIONS=125} [2024-06-28 04:25:02,152 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 74 predicate places. [2024-06-28 04:25:02,152 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 125 transitions, 1207 flow [2024-06-28 04:25:02,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:02,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:02,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:25:02,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 04:25:02,153 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:02,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:02,153 INFO L85 PathProgramCache]: Analyzing trace with hash -822310400, now seen corresponding path program 1 times [2024-06-28 04:25:02,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:02,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359500662] [2024-06-28 04:25:02,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:02,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:04,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:04,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359500662] [2024-06-28 04:25:04,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359500662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:04,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:04,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:25:04,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139659933] [2024-06-28 04:25:04,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:04,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:25:04,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:04,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:25:04,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:25:04,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:04,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 125 transitions, 1207 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:04,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:04,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:04,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:05,521 INFO L124 PetriNetUnfolderBase]: 1707/2762 cut-off events. [2024-06-28 04:25:05,521 INFO L125 PetriNetUnfolderBase]: For 64707/64707 co-relation queries the response was YES. [2024-06-28 04:25:05,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17790 conditions, 2762 events. 1707/2762 cut-off events. For 64707/64707 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14862 event pairs, 602 based on Foata normal form. 2/2762 useless extension candidates. Maximal degree in co-relation 17737. Up to 2606 conditions per place. [2024-06-28 04:25:05,538 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 129 selfloop transitions, 18 changer transitions 0/152 dead transitions. [2024-06-28 04:25:05,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 152 transitions, 1620 flow [2024-06-28 04:25:05,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:25:05,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:25:05,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 04:25:05,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-28 04:25:05,540 INFO L175 Difference]: Start difference. First operand has 118 places, 125 transitions, 1207 flow. Second operand 7 states and 121 transitions. [2024-06-28 04:25:05,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 152 transitions, 1620 flow [2024-06-28 04:25:05,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 152 transitions, 1569 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 04:25:05,591 INFO L231 Difference]: Finished difference. Result has 120 places, 129 transitions, 1255 flow [2024-06-28 04:25:05,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1255, PETRI_PLACES=120, PETRI_TRANSITIONS=129} [2024-06-28 04:25:05,592 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-28 04:25:05,592 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 129 transitions, 1255 flow [2024-06-28 04:25:05,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:05,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:05,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:25:05,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 04:25:05,593 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)] === [2024-06-28 04:25:05,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:05,593 INFO L85 PathProgramCache]: Analyzing trace with hash 95298290, now seen corresponding path program 2 times [2024-06-28 04:25:05,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:05,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206658591] [2024-06-28 04:25:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:05,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:07,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:07,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206658591] [2024-06-28 04:25:07,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206658591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:07,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:07,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:25:07,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075350561] [2024-06-28 04:25:07,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:07,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:25:07,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:07,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:25:07,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:25:07,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:07,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 129 transitions, 1255 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:07,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:07,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:07,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:08,487 INFO L124 PetriNetUnfolderBase]: 1716/2782 cut-off events. [2024-06-28 04:25:08,487 INFO L125 PetriNetUnfolderBase]: For 70953/70953 co-relation queries the response was YES. [2024-06-28 04:25:08,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18514 conditions, 2782 events. 1716/2782 cut-off events. For 70953/70953 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15068 event pairs, 603 based on Foata normal form. 3/2783 useless extension candidates. Maximal degree in co-relation 18460. Up to 2591 conditions per place. [2024-06-28 04:25:08,507 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 123 selfloop transitions, 26 changer transitions 0/154 dead transitions. [2024-06-28 04:25:08,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 154 transitions, 1681 flow [2024-06-28 04:25:08,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:25:08,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:25:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 04:25:08,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-28 04:25:08,508 INFO L175 Difference]: Start difference. First operand has 120 places, 129 transitions, 1255 flow. Second operand 7 states and 120 transitions. [2024-06-28 04:25:08,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 154 transitions, 1681 flow [2024-06-28 04:25:08,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 154 transitions, 1621 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 04:25:08,571 INFO L231 Difference]: Finished difference. Result has 122 places, 132 transitions, 1299 flow [2024-06-28 04:25:08,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1299, PETRI_PLACES=122, PETRI_TRANSITIONS=132} [2024-06-28 04:25:08,572 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-28 04:25:08,572 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 132 transitions, 1299 flow [2024-06-28 04:25:08,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:08,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:08,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:25:08,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 04:25:08,573 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)] === [2024-06-28 04:25:08,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:08,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1539789738, now seen corresponding path program 3 times [2024-06-28 04:25:08,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:08,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57213571] [2024-06-28 04:25:08,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:08,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:11,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:11,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57213571] [2024-06-28 04:25:11,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57213571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:11,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:11,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:11,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964073861] [2024-06-28 04:25:11,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:11,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:11,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:11,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:11,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:11,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:11,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 132 transitions, 1299 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:11,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:11,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:11,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:12,053 INFO L124 PetriNetUnfolderBase]: 1726/2796 cut-off events. [2024-06-28 04:25:12,053 INFO L125 PetriNetUnfolderBase]: For 77166/77166 co-relation queries the response was YES. [2024-06-28 04:25:12,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19132 conditions, 2796 events. 1726/2796 cut-off events. For 77166/77166 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15127 event pairs, 605 based on Foata normal form. 2/2791 useless extension candidates. Maximal degree in co-relation 19077. Up to 2602 conditions per place. [2024-06-28 04:25:12,072 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 129 selfloop transitions, 22 changer transitions 0/156 dead transitions. [2024-06-28 04:25:12,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 156 transitions, 1724 flow [2024-06-28 04:25:12,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:25:12,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:25:12,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 04:25:12,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 04:25:12,073 INFO L175 Difference]: Start difference. First operand has 122 places, 132 transitions, 1299 flow. Second operand 7 states and 119 transitions. [2024-06-28 04:25:12,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 156 transitions, 1724 flow [2024-06-28 04:25:12,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 156 transitions, 1648 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 04:25:12,117 INFO L231 Difference]: Finished difference. Result has 124 places, 136 transitions, 1342 flow [2024-06-28 04:25:12,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1342, PETRI_PLACES=124, PETRI_TRANSITIONS=136} [2024-06-28 04:25:12,117 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-28 04:25:12,117 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 136 transitions, 1342 flow [2024-06-28 04:25:12,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:12,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:12,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:25:12,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 04:25:12,118 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)] === [2024-06-28 04:25:12,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:12,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1527409578, now seen corresponding path program 4 times [2024-06-28 04:25:12,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:12,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218710679] [2024-06-28 04:25:12,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:12,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:15,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:15,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218710679] [2024-06-28 04:25:15,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218710679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:15,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:15,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:15,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068468594] [2024-06-28 04:25:15,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:15,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:15,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:15,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:15,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:15,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:15,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 136 transitions, 1342 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:15,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:15,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:15,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:15,654 INFO L124 PetriNetUnfolderBase]: 1723/2790 cut-off events. [2024-06-28 04:25:15,655 INFO L125 PetriNetUnfolderBase]: For 83148/83148 co-relation queries the response was YES. [2024-06-28 04:25:15,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19680 conditions, 2790 events. 1723/2790 cut-off events. For 83148/83148 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15093 event pairs, 611 based on Foata normal form. 1/2784 useless extension candidates. Maximal degree in co-relation 19624. Up to 2586 conditions per place. [2024-06-28 04:25:15,675 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 122 selfloop transitions, 31 changer transitions 0/158 dead transitions. [2024-06-28 04:25:15,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 158 transitions, 1776 flow [2024-06-28 04:25:15,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:25:15,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:25:15,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 04:25:15,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-28 04:25:15,676 INFO L175 Difference]: Start difference. First operand has 124 places, 136 transitions, 1342 flow. Second operand 7 states and 116 transitions. [2024-06-28 04:25:15,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 158 transitions, 1776 flow [2024-06-28 04:25:15,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 158 transitions, 1696 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-28 04:25:15,735 INFO L231 Difference]: Finished difference. Result has 127 places, 142 transitions, 1434 flow [2024-06-28 04:25:15,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1434, PETRI_PLACES=127, PETRI_TRANSITIONS=142} [2024-06-28 04:25:15,736 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-28 04:25:15,736 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 142 transitions, 1434 flow [2024-06-28 04:25:15,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:15,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:15,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:25:15,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 04:25:15,736 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)] === [2024-06-28 04:25:15,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:15,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1804164608, now seen corresponding path program 5 times [2024-06-28 04:25:15,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:15,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904932268] [2024-06-28 04:25:15,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:15,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:17,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:17,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904932268] [2024-06-28 04:25:17,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904932268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:17,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:17,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:25:17,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627520913] [2024-06-28 04:25:17,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:17,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:25:17,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:17,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:25:17,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:25:17,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:17,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 142 transitions, 1434 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:17,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:17,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:17,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:18,822 INFO L124 PetriNetUnfolderBase]: 1727/2795 cut-off events. [2024-06-28 04:25:18,822 INFO L125 PetriNetUnfolderBase]: For 90208/90208 co-relation queries the response was YES. [2024-06-28 04:25:18,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20219 conditions, 2795 events. 1727/2795 cut-off events. For 90208/90208 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15197 event pairs, 612 based on Foata normal form. 3/2787 useless extension candidates. Maximal degree in co-relation 20161. Up to 2608 conditions per place. [2024-06-28 04:25:18,843 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 128 selfloop transitions, 26 changer transitions 0/159 dead transitions. [2024-06-28 04:25:18,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 159 transitions, 1862 flow [2024-06-28 04:25:18,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:25:18,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:25:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-28 04:25:18,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-28 04:25:18,844 INFO L175 Difference]: Start difference. First operand has 127 places, 142 transitions, 1434 flow. Second operand 7 states and 113 transitions. [2024-06-28 04:25:18,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 159 transitions, 1862 flow [2024-06-28 04:25:18,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 159 transitions, 1807 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-28 04:25:18,900 INFO L231 Difference]: Finished difference. Result has 131 places, 145 transitions, 1495 flow [2024-06-28 04:25:18,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1495, PETRI_PLACES=131, PETRI_TRANSITIONS=145} [2024-06-28 04:25:18,901 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-28 04:25:18,901 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 145 transitions, 1495 flow [2024-06-28 04:25:18,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:18,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:18,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:25:18,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 04:25:18,901 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)] === [2024-06-28 04:25:18,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:18,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1071229896, now seen corresponding path program 6 times [2024-06-28 04:25:18,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:18,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452398291] [2024-06-28 04:25:18,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:18,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:20,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:20,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452398291] [2024-06-28 04:25:20,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452398291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:20,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:20,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:25:20,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463927956] [2024-06-28 04:25:20,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:20,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:25:20,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:20,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:25:20,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:25:20,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:20,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 145 transitions, 1495 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:20,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:20,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:20,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:21,850 INFO L124 PetriNetUnfolderBase]: 1723/2795 cut-off events. [2024-06-28 04:25:21,850 INFO L125 PetriNetUnfolderBase]: For 95921/95921 co-relation queries the response was YES. [2024-06-28 04:25:21,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20688 conditions, 2795 events. 1723/2795 cut-off events. For 95921/95921 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15184 event pairs, 594 based on Foata normal form. 2/2786 useless extension candidates. Maximal degree in co-relation 20628. Up to 2584 conditions per place. [2024-06-28 04:25:21,870 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 126 selfloop transitions, 32 changer transitions 0/163 dead transitions. [2024-06-28 04:25:21,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 163 transitions, 1933 flow [2024-06-28 04:25:21,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:25:21,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:25:21,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-28 04:25:21,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-28 04:25:21,871 INFO L175 Difference]: Start difference. First operand has 131 places, 145 transitions, 1495 flow. Second operand 7 states and 113 transitions. [2024-06-28 04:25:21,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 163 transitions, 1933 flow [2024-06-28 04:25:21,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 163 transitions, 1845 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 04:25:21,922 INFO L231 Difference]: Finished difference. Result has 134 places, 149 transitions, 1551 flow [2024-06-28 04:25:21,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1407, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1551, PETRI_PLACES=134, PETRI_TRANSITIONS=149} [2024-06-28 04:25:21,922 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-28 04:25:21,923 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 149 transitions, 1551 flow [2024-06-28 04:25:21,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:21,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:21,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:25:21,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 04:25:21,923 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)] === [2024-06-28 04:25:21,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:21,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1527400650, now seen corresponding path program 1 times [2024-06-28 04:25:21,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:21,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143259724] [2024-06-28 04:25:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:21,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:21,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:24,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:24,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143259724] [2024-06-28 04:25:24,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143259724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:24,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:24,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:24,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902033459] [2024-06-28 04:25:24,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:24,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:24,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:24,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:24,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:24,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:25:24,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 149 transitions, 1551 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:24,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:24,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:25:24,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:25,395 INFO L124 PetriNetUnfolderBase]: 1653/2726 cut-off events. [2024-06-28 04:25:25,395 INFO L125 PetriNetUnfolderBase]: For 104668/104723 co-relation queries the response was YES. [2024-06-28 04:25:25,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20607 conditions, 2726 events. 1653/2726 cut-off events. For 104668/104723 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15131 event pairs, 536 based on Foata normal form. 6/2715 useless extension candidates. Maximal degree in co-relation 20545. Up to 2494 conditions per place. [2024-06-28 04:25:25,417 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 134 selfloop transitions, 20 changer transitions 0/171 dead transitions. [2024-06-28 04:25:25,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 171 transitions, 1962 flow [2024-06-28 04:25:25,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:25:25,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:25:25,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 04:25:25,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-28 04:25:25,418 INFO L175 Difference]: Start difference. First operand has 134 places, 149 transitions, 1551 flow. Second operand 8 states and 132 transitions. [2024-06-28 04:25:25,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 171 transitions, 1962 flow [2024-06-28 04:25:25,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 171 transitions, 1894 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-28 04:25:25,489 INFO L231 Difference]: Finished difference. Result has 139 places, 152 transitions, 1566 flow [2024-06-28 04:25:25,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1566, PETRI_PLACES=139, PETRI_TRANSITIONS=152} [2024-06-28 04:25:25,489 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-28 04:25:25,489 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 152 transitions, 1566 flow [2024-06-28 04:25:25,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:25,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:25,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:25:25,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 04:25:25,490 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)] === [2024-06-28 04:25:25,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:25,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1789864928, now seen corresponding path program 1 times [2024-06-28 04:25:25,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:25,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560028777] [2024-06-28 04:25:25,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:25,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:27,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:27,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560028777] [2024-06-28 04:25:27,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560028777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:27,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:27,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:27,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777946688] [2024-06-28 04:25:27,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:27,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:27,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:27,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:27,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:27,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:27,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 152 transitions, 1566 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:27,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:27,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:27,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:28,972 INFO L124 PetriNetUnfolderBase]: 1726/2803 cut-off events. [2024-06-28 04:25:28,972 INFO L125 PetriNetUnfolderBase]: For 107714/107714 co-relation queries the response was YES. [2024-06-28 04:25:28,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21585 conditions, 2803 events. 1726/2803 cut-off events. For 107714/107714 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15298 event pairs, 627 based on Foata normal form. 1/2802 useless extension candidates. Maximal degree in co-relation 21521. Up to 2680 conditions per place. [2024-06-28 04:25:28,995 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 147 selfloop transitions, 17 changer transitions 0/169 dead transitions. [2024-06-28 04:25:28,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 169 transitions, 1979 flow [2024-06-28 04:25:28,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:25:28,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:25:28,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-28 04:25:28,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36212624584717606 [2024-06-28 04:25:28,997 INFO L175 Difference]: Start difference. First operand has 139 places, 152 transitions, 1566 flow. Second operand 7 states and 109 transitions. [2024-06-28 04:25:28,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 169 transitions, 1979 flow [2024-06-28 04:25:29,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 169 transitions, 1920 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 04:25:29,064 INFO L231 Difference]: Finished difference. Result has 140 places, 156 transitions, 1597 flow [2024-06-28 04:25:29,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1597, PETRI_PLACES=140, PETRI_TRANSITIONS=156} [2024-06-28 04:25:29,064 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-28 04:25:29,064 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 156 transitions, 1597 flow [2024-06-28 04:25:29,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:29,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:29,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:25:29,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 04:25:29,065 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)] === [2024-06-28 04:25:29,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:29,065 INFO L85 PathProgramCache]: Analyzing trace with hash 99905276, now seen corresponding path program 1 times [2024-06-28 04:25:29,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:29,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899256242] [2024-06-28 04:25:29,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:29,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:31,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:31,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899256242] [2024-06-28 04:25:31,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899256242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:31,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:31,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:31,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140800925] [2024-06-28 04:25:31,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:31,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:31,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:31,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:31,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:31,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:31,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 156 transitions, 1597 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:31,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:31,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:31,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:32,579 INFO L124 PetriNetUnfolderBase]: 1791/2901 cut-off events. [2024-06-28 04:25:32,579 INFO L125 PetriNetUnfolderBase]: For 117385/117385 co-relation queries the response was YES. [2024-06-28 04:25:32,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22620 conditions, 2901 events. 1791/2901 cut-off events. For 117385/117385 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15872 event pairs, 597 based on Foata normal form. 3/2901 useless extension candidates. Maximal degree in co-relation 22555. Up to 2669 conditions per place. [2024-06-28 04:25:32,603 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 157 selfloop transitions, 35 changer transitions 0/197 dead transitions. [2024-06-28 04:25:32,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 197 transitions, 2328 flow [2024-06-28 04:25:32,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:25:32,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:25:32,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 04:25:32,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-28 04:25:32,604 INFO L175 Difference]: Start difference. First operand has 140 places, 156 transitions, 1597 flow. Second operand 8 states and 138 transitions. [2024-06-28 04:25:32,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 197 transitions, 2328 flow [2024-06-28 04:25:32,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 197 transitions, 2284 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 04:25:32,691 INFO L231 Difference]: Finished difference. Result has 144 places, 170 transitions, 1868 flow [2024-06-28 04:25:32,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1553, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1868, PETRI_PLACES=144, PETRI_TRANSITIONS=170} [2024-06-28 04:25:32,691 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-28 04:25:32,691 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 170 transitions, 1868 flow [2024-06-28 04:25:32,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:32,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:32,692 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] [2024-06-28 04:25:32,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 04:25:32,692 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)] === [2024-06-28 04:25:32,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:32,692 INFO L85 PathProgramCache]: Analyzing trace with hash -778629926, now seen corresponding path program 1 times [2024-06-28 04:25:32,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:32,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752132639] [2024-06-28 04:25:32,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:32,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:35,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:35,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752132639] [2024-06-28 04:25:35,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752132639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:35,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:35,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:35,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351558230] [2024-06-28 04:25:35,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:35,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:35,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:35,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:35,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:35,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:35,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 170 transitions, 1868 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:35,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:35,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:35,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:36,411 INFO L124 PetriNetUnfolderBase]: 1811/2928 cut-off events. [2024-06-28 04:25:36,411 INFO L125 PetriNetUnfolderBase]: For 126592/126592 co-relation queries the response was YES. [2024-06-28 04:25:36,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23793 conditions, 2928 events. 1811/2928 cut-off events. For 126592/126592 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15963 event pairs, 586 based on Foata normal form. 4/2930 useless extension candidates. Maximal degree in co-relation 23726. Up to 2746 conditions per place. [2024-06-28 04:25:36,476 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 172 selfloop transitions, 22 changer transitions 0/199 dead transitions. [2024-06-28 04:25:36,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 199 transitions, 2421 flow [2024-06-28 04:25:36,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:25:36,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:25:36,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 04:25:36,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-28 04:25:36,477 INFO L175 Difference]: Start difference. First operand has 144 places, 170 transitions, 1868 flow. Second operand 8 states and 135 transitions. [2024-06-28 04:25:36,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 199 transitions, 2421 flow [2024-06-28 04:25:36,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 199 transitions, 2335 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-28 04:25:36,561 INFO L231 Difference]: Finished difference. Result has 148 places, 174 transitions, 1922 flow [2024-06-28 04:25:36,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1922, PETRI_PLACES=148, PETRI_TRANSITIONS=174} [2024-06-28 04:25:36,562 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-28 04:25:36,562 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 174 transitions, 1922 flow [2024-06-28 04:25:36,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:36,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:36,562 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] [2024-06-28 04:25:36,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 04:25:36,562 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)] === [2024-06-28 04:25:36,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:36,563 INFO L85 PathProgramCache]: Analyzing trace with hash 277036982, now seen corresponding path program 2 times [2024-06-28 04:25:36,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:36,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661669490] [2024-06-28 04:25:36,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:36,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:38,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:38,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661669490] [2024-06-28 04:25:38,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661669490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:38,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:38,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:38,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817855475] [2024-06-28 04:25:38,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:38,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:38,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:38,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:38,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:38,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:38,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 174 transitions, 1922 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:38,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:38,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:38,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:40,119 INFO L124 PetriNetUnfolderBase]: 1861/3008 cut-off events. [2024-06-28 04:25:40,120 INFO L125 PetriNetUnfolderBase]: For 141086/141086 co-relation queries the response was YES. [2024-06-28 04:25:40,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25209 conditions, 3008 events. 1861/3008 cut-off events. For 141086/141086 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 16523 event pairs, 563 based on Foata normal form. 5/3011 useless extension candidates. Maximal degree in co-relation 25140. Up to 2728 conditions per place. [2024-06-28 04:25:40,144 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 174 selfloop transitions, 42 changer transitions 0/221 dead transitions. [2024-06-28 04:25:40,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 221 transitions, 2883 flow [2024-06-28 04:25:40,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:25:40,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:25:40,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 04:25:40,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-28 04:25:40,145 INFO L175 Difference]: Start difference. First operand has 148 places, 174 transitions, 1922 flow. Second operand 8 states and 141 transitions. [2024-06-28 04:25:40,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 221 transitions, 2883 flow [2024-06-28 04:25:40,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 221 transitions, 2782 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 04:25:40,248 INFO L231 Difference]: Finished difference. Result has 152 places, 190 transitions, 2236 flow [2024-06-28 04:25:40,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1821, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2236, PETRI_PLACES=152, PETRI_TRANSITIONS=190} [2024-06-28 04:25:40,248 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-28 04:25:40,249 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 190 transitions, 2236 flow [2024-06-28 04:25:40,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:40,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:40,249 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] [2024-06-28 04:25:40,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 04:25:40,249 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)] === [2024-06-28 04:25:40,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:40,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1086113572, now seen corresponding path program 3 times [2024-06-28 04:25:40,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:40,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798026697] [2024-06-28 04:25:40,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:40,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:42,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:42,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798026697] [2024-06-28 04:25:42,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798026697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:42,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:42,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:42,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405313222] [2024-06-28 04:25:42,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:42,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:42,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:42,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:42,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:42,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:42,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 190 transitions, 2236 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:42,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:42,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:42,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:43,697 INFO L124 PetriNetUnfolderBase]: 1858/3008 cut-off events. [2024-06-28 04:25:43,697 INFO L125 PetriNetUnfolderBase]: For 150728/150728 co-relation queries the response was YES. [2024-06-28 04:25:43,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25708 conditions, 3008 events. 1858/3008 cut-off events. For 150728/150728 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 16537 event pairs, 561 based on Foata normal form. 8/3014 useless extension candidates. Maximal degree in co-relation 25636. Up to 2728 conditions per place. [2024-06-28 04:25:43,722 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 167 selfloop transitions, 49 changer transitions 0/221 dead transitions. [2024-06-28 04:25:43,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 221 transitions, 2912 flow [2024-06-28 04:25:43,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:25:43,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:25:43,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 04:25:43,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-28 04:25:43,723 INFO L175 Difference]: Start difference. First operand has 152 places, 190 transitions, 2236 flow. Second operand 8 states and 140 transitions. [2024-06-28 04:25:43,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 221 transitions, 2912 flow [2024-06-28 04:25:43,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 221 transitions, 2786 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-06-28 04:25:43,813 INFO L231 Difference]: Finished difference. Result has 158 places, 194 transitions, 2314 flow [2024-06-28 04:25:43,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2110, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2314, PETRI_PLACES=158, PETRI_TRANSITIONS=194} [2024-06-28 04:25:43,813 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-28 04:25:43,813 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 194 transitions, 2314 flow [2024-06-28 04:25:43,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:43,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:43,814 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] [2024-06-28 04:25:43,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 04:25:43,814 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)] === [2024-06-28 04:25:43,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:43,814 INFO L85 PathProgramCache]: Analyzing trace with hash 455560972, now seen corresponding path program 1 times [2024-06-28 04:25:43,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:43,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708921852] [2024-06-28 04:25:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:43,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:47,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:47,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708921852] [2024-06-28 04:25:47,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708921852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:47,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:47,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:25:47,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838386454] [2024-06-28 04:25:47,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:47,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:25:47,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:47,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:25:47,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:25:47,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:47,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 194 transitions, 2314 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:47,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:47,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:47,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:48,625 INFO L124 PetriNetUnfolderBase]: 1902/3074 cut-off events. [2024-06-28 04:25:48,626 INFO L125 PetriNetUnfolderBase]: For 163449/163449 co-relation queries the response was YES. [2024-06-28 04:25:48,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26756 conditions, 3074 events. 1902/3074 cut-off events. For 163449/163449 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16916 event pairs, 551 based on Foata normal form. 12/3084 useless extension candidates. Maximal degree in co-relation 26682. Up to 2772 conditions per place. [2024-06-28 04:25:48,651 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 177 selfloop transitions, 42 changer transitions 0/224 dead transitions. [2024-06-28 04:25:48,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 224 transitions, 2971 flow [2024-06-28 04:25:48,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:25:48,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:25:48,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 04:25:48,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-28 04:25:48,652 INFO L175 Difference]: Start difference. First operand has 158 places, 194 transitions, 2314 flow. Second operand 8 states and 142 transitions. [2024-06-28 04:25:48,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 224 transitions, 2971 flow [2024-06-28 04:25:48,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 224 transitions, 2827 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 04:25:48,761 INFO L231 Difference]: Finished difference. Result has 160 places, 195 transitions, 2287 flow [2024-06-28 04:25:48,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2170, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2287, PETRI_PLACES=160, PETRI_TRANSITIONS=195} [2024-06-28 04:25:48,761 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-28 04:25:48,761 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 195 transitions, 2287 flow [2024-06-28 04:25:48,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:48,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:48,762 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] [2024-06-28 04:25:48,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 04:25:48,762 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)] === [2024-06-28 04:25:48,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:48,762 INFO L85 PathProgramCache]: Analyzing trace with hash -488839624, now seen corresponding path program 4 times [2024-06-28 04:25:48,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:48,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098538744] [2024-06-28 04:25:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:48,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:51,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:51,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098538744] [2024-06-28 04:25:51,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098538744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:51,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:51,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:51,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074755800] [2024-06-28 04:25:51,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:51,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:51,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:51,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:51,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:51,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:51,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 195 transitions, 2287 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:51,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:51,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:51,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:52,872 INFO L124 PetriNetUnfolderBase]: 1922/3104 cut-off events. [2024-06-28 04:25:52,872 INFO L125 PetriNetUnfolderBase]: For 168820/168820 co-relation queries the response was YES. [2024-06-28 04:25:52,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27317 conditions, 3104 events. 1922/3104 cut-off events. For 168820/168820 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 17109 event pairs, 557 based on Foata normal form. 4/3101 useless extension candidates. Maximal degree in co-relation 27242. Up to 2882 conditions per place. [2024-06-28 04:25:52,901 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 190 selfloop transitions, 26 changer transitions 0/221 dead transitions. [2024-06-28 04:25:52,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 221 transitions, 2896 flow [2024-06-28 04:25:52,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:25:52,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:25:52,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 04:25:52,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-28 04:25:52,902 INFO L175 Difference]: Start difference. First operand has 160 places, 195 transitions, 2287 flow. Second operand 8 states and 133 transitions. [2024-06-28 04:25:52,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 221 transitions, 2896 flow [2024-06-28 04:25:53,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 221 transitions, 2810 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 04:25:53,025 INFO L231 Difference]: Finished difference. Result has 162 places, 199 transitions, 2367 flow [2024-06-28 04:25:53,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2201, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2367, PETRI_PLACES=162, PETRI_TRANSITIONS=199} [2024-06-28 04:25:53,026 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-28 04:25:53,026 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 199 transitions, 2367 flow [2024-06-28 04:25:53,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:53,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:53,026 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] [2024-06-28 04:25:53,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 04:25:53,027 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)] === [2024-06-28 04:25:53,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:53,027 INFO L85 PathProgramCache]: Analyzing trace with hash -117941860, now seen corresponding path program 2 times [2024-06-28 04:25:53,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:53,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597263710] [2024-06-28 04:25:53,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:53,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:55,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:55,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597263710] [2024-06-28 04:25:55,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597263710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:55,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:55,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:25:55,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95965573] [2024-06-28 04:25:55,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:55,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:25:55,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:55,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:25:55,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:25:55,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:55,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 199 transitions, 2367 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:55,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:55,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:55,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:56,712 INFO L124 PetriNetUnfolderBase]: 1932/3114 cut-off events. [2024-06-28 04:25:56,712 INFO L125 PetriNetUnfolderBase]: For 176687/176687 co-relation queries the response was YES. [2024-06-28 04:25:56,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27958 conditions, 3114 events. 1932/3114 cut-off events. For 176687/176687 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 17125 event pairs, 566 based on Foata normal form. 2/3109 useless extension candidates. Maximal degree in co-relation 27882. Up to 2902 conditions per place. [2024-06-28 04:25:56,741 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 193 selfloop transitions, 26 changer transitions 0/224 dead transitions. [2024-06-28 04:25:56,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 224 transitions, 2942 flow [2024-06-28 04:25:56,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:25:56,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:25:56,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 04:25:56,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-28 04:25:56,742 INFO L175 Difference]: Start difference. First operand has 162 places, 199 transitions, 2367 flow. Second operand 8 states and 132 transitions. [2024-06-28 04:25:56,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 224 transitions, 2942 flow [2024-06-28 04:25:56,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 224 transitions, 2821 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-28 04:25:56,859 INFO L231 Difference]: Finished difference. Result has 164 places, 203 transitions, 2384 flow [2024-06-28 04:25:56,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2384, PETRI_PLACES=164, PETRI_TRANSITIONS=203} [2024-06-28 04:25:56,860 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-28 04:25:56,860 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 203 transitions, 2384 flow [2024-06-28 04:25:56,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:56,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:56,860 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] [2024-06-28 04:25:56,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 04:25:56,860 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)] === [2024-06-28 04:25:56,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:56,861 INFO L85 PathProgramCache]: Analyzing trace with hash -105054850, now seen corresponding path program 3 times [2024-06-28 04:25:56,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:56,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967734996] [2024-06-28 04:25:56,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:56,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:59,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:59,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967734996] [2024-06-28 04:25:59,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967734996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:59,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:59,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:25:59,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496884011] [2024-06-28 04:25:59,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:59,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:25:59,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:59,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:25:59,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:25:59,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:25:59,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 203 transitions, 2384 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:59,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:59,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:25:59,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:00,798 INFO L124 PetriNetUnfolderBase]: 1947/3136 cut-off events. [2024-06-28 04:26:00,798 INFO L125 PetriNetUnfolderBase]: For 184922/184922 co-relation queries the response was YES. [2024-06-28 04:26:00,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28468 conditions, 3136 events. 1947/3136 cut-off events. For 184922/184922 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17243 event pairs, 559 based on Foata normal form. 2/3131 useless extension candidates. Maximal degree in co-relation 28391. Up to 2884 conditions per place. [2024-06-28 04:26:00,829 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 183 selfloop transitions, 53 changer transitions 0/241 dead transitions. [2024-06-28 04:26:00,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 241 transitions, 3306 flow [2024-06-28 04:26:00,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:26:00,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:26:00,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-28 04:26:00,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3674418604651163 [2024-06-28 04:26:00,830 INFO L175 Difference]: Start difference. First operand has 164 places, 203 transitions, 2384 flow. Second operand 10 states and 158 transitions. [2024-06-28 04:26:00,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 241 transitions, 3306 flow [2024-06-28 04:26:00,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 241 transitions, 3215 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 04:26:00,958 INFO L231 Difference]: Finished difference. Result has 169 places, 219 transitions, 2740 flow [2024-06-28 04:26:00,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2293, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2740, PETRI_PLACES=169, PETRI_TRANSITIONS=219} [2024-06-28 04:26:00,959 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-28 04:26:00,959 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 219 transitions, 2740 flow [2024-06-28 04:26:00,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:00,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:00,959 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] [2024-06-28 04:26:00,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 04:26:00,959 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)] === [2024-06-28 04:26:00,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:00,960 INFO L85 PathProgramCache]: Analyzing trace with hash -842378760, now seen corresponding path program 5 times [2024-06-28 04:26:00,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:00,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646244000] [2024-06-28 04:26:00,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:00,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:03,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:03,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646244000] [2024-06-28 04:26:03,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646244000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:03,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:03,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:03,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162486118] [2024-06-28 04:26:03,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:03,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:03,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:03,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:03,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:03,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:03,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 219 transitions, 2740 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:03,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:03,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:03,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:04,857 INFO L124 PetriNetUnfolderBase]: 1965/3163 cut-off events. [2024-06-28 04:26:04,858 INFO L125 PetriNetUnfolderBase]: For 205762/205762 co-relation queries the response was YES. [2024-06-28 04:26:04,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29752 conditions, 3163 events. 1965/3163 cut-off events. For 205762/205762 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17413 event pairs, 560 based on Foata normal form. 2/3158 useless extension candidates. Maximal degree in co-relation 29673. Up to 2896 conditions per place. [2024-06-28 04:26:04,888 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 194 selfloop transitions, 47 changer transitions 0/246 dead transitions. [2024-06-28 04:26:04,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 246 transitions, 3530 flow [2024-06-28 04:26:04,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:26:04,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:26:04,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 04:26:04,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-28 04:26:04,889 INFO L175 Difference]: Start difference. First operand has 169 places, 219 transitions, 2740 flow. Second operand 8 states and 134 transitions. [2024-06-28 04:26:04,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 246 transitions, 3530 flow [2024-06-28 04:26:05,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 246 transitions, 3310 flow, removed 90 selfloop flow, removed 5 redundant places. [2024-06-28 04:26:05,056 INFO L231 Difference]: Finished difference. Result has 172 places, 225 transitions, 2768 flow [2024-06-28 04:26:05,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2520, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2768, PETRI_PLACES=172, PETRI_TRANSITIONS=225} [2024-06-28 04:26:05,057 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-28 04:26:05,057 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 225 transitions, 2768 flow [2024-06-28 04:26:05,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:05,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:05,057 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] [2024-06-28 04:26:05,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 04:26:05,058 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)] === [2024-06-28 04:26:05,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:05,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1687874028, now seen corresponding path program 6 times [2024-06-28 04:26:05,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:05,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560196327] [2024-06-28 04:26:05,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:05,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:07,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:07,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560196327] [2024-06-28 04:26:07,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560196327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:07,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:07,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:26:07,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414277488] [2024-06-28 04:26:07,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:07,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:26:07,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:07,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:26:07,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:26:07,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:07,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 225 transitions, 2768 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:07,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:07,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:07,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:08,952 INFO L124 PetriNetUnfolderBase]: 1959/3157 cut-off events. [2024-06-28 04:26:08,952 INFO L125 PetriNetUnfolderBase]: For 214347/214347 co-relation queries the response was YES. [2024-06-28 04:26:08,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30042 conditions, 3157 events. 1959/3157 cut-off events. For 214347/214347 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17435 event pairs, 564 based on Foata normal form. 2/3157 useless extension candidates. Maximal degree in co-relation 29962. Up to 3012 conditions per place. [2024-06-28 04:26:08,984 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 220 selfloop transitions, 18 changer transitions 0/243 dead transitions. [2024-06-28 04:26:08,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 243 transitions, 3308 flow [2024-06-28 04:26:08,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:26:08,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:26:08,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-28 04:26:08,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-28 04:26:08,985 INFO L175 Difference]: Start difference. First operand has 172 places, 225 transitions, 2768 flow. Second operand 8 states and 125 transitions. [2024-06-28 04:26:08,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 243 transitions, 3308 flow [2024-06-28 04:26:09,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 243 transitions, 3156 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-28 04:26:09,150 INFO L231 Difference]: Finished difference. Result has 175 places, 225 transitions, 2659 flow [2024-06-28 04:26:09,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2616, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2659, PETRI_PLACES=175, PETRI_TRANSITIONS=225} [2024-06-28 04:26:09,151 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-28 04:26:09,151 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 225 transitions, 2659 flow [2024-06-28 04:26:09,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:09,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:09,151 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] [2024-06-28 04:26:09,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 04:26:09,152 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)] === [2024-06-28 04:26:09,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:09,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1665537122, now seen corresponding path program 4 times [2024-06-28 04:26:09,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:09,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353429142] [2024-06-28 04:26:09,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:09,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:11,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:11,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353429142] [2024-06-28 04:26:11,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353429142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:11,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:11,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:26:11,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838652564] [2024-06-28 04:26:11,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:11,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:26:11,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:11,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:26:11,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:26:11,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:11,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 225 transitions, 2659 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:11,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:11,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:11,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:12,994 INFO L124 PetriNetUnfolderBase]: 2040/3293 cut-off events. [2024-06-28 04:26:12,994 INFO L125 PetriNetUnfolderBase]: For 231145/231145 co-relation queries the response was YES. [2024-06-28 04:26:13,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31462 conditions, 3293 events. 2040/3293 cut-off events. For 231145/231145 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18405 event pairs, 440 based on Foata normal form. 2/3288 useless extension candidates. Maximal degree in co-relation 31381. Up to 2411 conditions per place. [2024-06-28 04:26:13,025 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 143 selfloop transitions, 125 changer transitions 0/273 dead transitions. [2024-06-28 04:26:13,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 273 transitions, 3846 flow [2024-06-28 04:26:13,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:26:13,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:26:13,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 04:26:13,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-28 04:26:13,026 INFO L175 Difference]: Start difference. First operand has 175 places, 225 transitions, 2659 flow. Second operand 8 states and 143 transitions. [2024-06-28 04:26:13,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 273 transitions, 3846 flow [2024-06-28 04:26:13,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 273 transitions, 3764 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-28 04:26:13,210 INFO L231 Difference]: Finished difference. Result has 176 places, 245 transitions, 3372 flow [2024-06-28 04:26:13,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2547, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3372, PETRI_PLACES=176, PETRI_TRANSITIONS=245} [2024-06-28 04:26:13,210 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-28 04:26:13,210 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 245 transitions, 3372 flow [2024-06-28 04:26:13,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:13,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:13,210 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] [2024-06-28 04:26:13,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 04:26:13,211 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)] === [2024-06-28 04:26:13,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:13,211 INFO L85 PathProgramCache]: Analyzing trace with hash 112572908, now seen corresponding path program 7 times [2024-06-28 04:26:13,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:13,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046537847] [2024-06-28 04:26:13,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:13,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:15,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:15,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046537847] [2024-06-28 04:26:15,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046537847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:15,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:15,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:26:15,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859567036] [2024-06-28 04:26:15,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:15,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:26:15,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:15,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:26:15,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:26:16,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:16,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 245 transitions, 3372 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:16,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:16,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:16,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:17,650 INFO L124 PetriNetUnfolderBase]: 2101/3402 cut-off events. [2024-06-28 04:26:17,651 INFO L125 PetriNetUnfolderBase]: For 265024/265024 co-relation queries the response was YES. [2024-06-28 04:26:17,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34685 conditions, 3402 events. 2101/3402 cut-off events. For 265024/265024 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19270 event pairs, 357 based on Foata normal form. 11/3411 useless extension candidates. Maximal degree in co-relation 34602. Up to 2577 conditions per place. [2024-06-28 04:26:17,684 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 178 selfloop transitions, 103 changer transitions 0/286 dead transitions. [2024-06-28 04:26:17,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 286 transitions, 4474 flow [2024-06-28 04:26:17,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:26:17,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:26:17,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-28 04:26:17,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-28 04:26:17,686 INFO L175 Difference]: Start difference. First operand has 176 places, 245 transitions, 3372 flow. Second operand 9 states and 150 transitions. [2024-06-28 04:26:17,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 286 transitions, 4474 flow [2024-06-28 04:26:17,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 286 transitions, 4349 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-28 04:26:17,909 INFO L231 Difference]: Finished difference. Result has 184 places, 259 transitions, 3975 flow [2024-06-28 04:26:17,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3259, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3975, PETRI_PLACES=184, PETRI_TRANSITIONS=259} [2024-06-28 04:26:17,910 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-28 04:26:17,910 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 259 transitions, 3975 flow [2024-06-28 04:26:17,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:17,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:17,910 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] [2024-06-28 04:26:17,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 04:26:17,911 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)] === [2024-06-28 04:26:17,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:17,911 INFO L85 PathProgramCache]: Analyzing trace with hash 112127438, now seen corresponding path program 8 times [2024-06-28 04:26:17,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:17,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320966467] [2024-06-28 04:26:17,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:17,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:20,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:20,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320966467] [2024-06-28 04:26:20,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320966467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:20,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:20,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:26:20,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382289501] [2024-06-28 04:26:20,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:20,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:26:20,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:20,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:26:20,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:26:20,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:20,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 259 transitions, 3975 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:20,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:20,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:20,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:21,415 INFO L124 PetriNetUnfolderBase]: 2151/3471 cut-off events. [2024-06-28 04:26:21,415 INFO L125 PetriNetUnfolderBase]: For 287391/287391 co-relation queries the response was YES. [2024-06-28 04:26:21,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37588 conditions, 3471 events. 2151/3471 cut-off events. For 287391/287391 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19662 event pairs, 585 based on Foata normal form. 4/3464 useless extension candidates. Maximal degree in co-relation 37501. Up to 3031 conditions per place. [2024-06-28 04:26:21,450 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 232 selfloop transitions, 65 changer transitions 0/302 dead transitions. [2024-06-28 04:26:21,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 302 transitions, 5486 flow [2024-06-28 04:26:21,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:26:21,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:26:21,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:26:21,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 04:26:21,453 INFO L175 Difference]: Start difference. First operand has 184 places, 259 transitions, 3975 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:26:21,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 302 transitions, 5486 flow [2024-06-28 04:26:21,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 302 transitions, 5387 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-28 04:26:21,700 INFO L231 Difference]: Finished difference. Result has 190 places, 271 transitions, 4489 flow [2024-06-28 04:26:21,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3878, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4489, PETRI_PLACES=190, PETRI_TRANSITIONS=271} [2024-06-28 04:26:21,701 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 146 predicate places. [2024-06-28 04:26:21,701 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 271 transitions, 4489 flow [2024-06-28 04:26:21,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:21,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:21,701 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] [2024-06-28 04:26:21,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 04:26:21,701 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)] === [2024-06-28 04:26:21,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:21,702 INFO L85 PathProgramCache]: Analyzing trace with hash 944966660, now seen corresponding path program 9 times [2024-06-28 04:26:21,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:21,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133410723] [2024-06-28 04:26:21,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:21,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:24,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:24,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133410723] [2024-06-28 04:26:24,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133410723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:24,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:24,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:26:24,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373366020] [2024-06-28 04:26:24,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:24,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:26:24,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:24,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:26:24,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:26:24,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:24,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 271 transitions, 4489 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:24,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:24,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:24,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:25,712 INFO L124 PetriNetUnfolderBase]: 2219/3580 cut-off events. [2024-06-28 04:26:25,712 INFO L125 PetriNetUnfolderBase]: For 321356/321356 co-relation queries the response was YES. [2024-06-28 04:26:25,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39950 conditions, 3580 events. 2219/3580 cut-off events. For 321356/321356 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 20537 event pairs, 375 based on Foata normal form. 9/3578 useless extension candidates. Maximal degree in co-relation 39860. Up to 2600 conditions per place. [2024-06-28 04:26:25,751 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 188 selfloop transitions, 121 changer transitions 0/314 dead transitions. [2024-06-28 04:26:25,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 314 transitions, 5758 flow [2024-06-28 04:26:25,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:26:25,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:26:25,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-28 04:26:25,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-28 04:26:25,752 INFO L175 Difference]: Start difference. First operand has 190 places, 271 transitions, 4489 flow. Second operand 9 states and 155 transitions. [2024-06-28 04:26:25,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 314 transitions, 5758 flow [2024-06-28 04:26:26,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 314 transitions, 5655 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-06-28 04:26:26,061 INFO L231 Difference]: Finished difference. Result has 199 places, 284 transitions, 5188 flow [2024-06-28 04:26:26,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4396, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5188, PETRI_PLACES=199, PETRI_TRANSITIONS=284} [2024-06-28 04:26:26,061 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-28 04:26:26,061 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 284 transitions, 5188 flow [2024-06-28 04:26:26,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:26,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:26,062 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] [2024-06-28 04:26:26,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 04:26:26,062 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)] === [2024-06-28 04:26:26,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:26,062 INFO L85 PathProgramCache]: Analyzing trace with hash 340474058, now seen corresponding path program 10 times [2024-06-28 04:26:26,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:26,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547069373] [2024-06-28 04:26:26,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:26,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:28,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:28,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547069373] [2024-06-28 04:26:28,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547069373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:28,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:28,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:26:28,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014988251] [2024-06-28 04:26:28,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:28,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:26:28,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:28,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:26:28,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:26:28,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:28,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 284 transitions, 5188 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:28,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:28,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:28,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:30,356 INFO L124 PetriNetUnfolderBase]: 2295/3729 cut-off events. [2024-06-28 04:26:30,356 INFO L125 PetriNetUnfolderBase]: For 360352/360352 co-relation queries the response was YES. [2024-06-28 04:26:30,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43755 conditions, 3729 events. 2295/3729 cut-off events. For 360352/360352 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21733 event pairs, 362 based on Foata normal form. 17/3744 useless extension candidates. Maximal degree in co-relation 43661. Up to 2750 conditions per place. [2024-06-28 04:26:30,396 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 210 selfloop transitions, 128 changer transitions 0/343 dead transitions. [2024-06-28 04:26:30,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 343 transitions, 6896 flow [2024-06-28 04:26:30,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:26:30,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:26:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-28 04:26:30,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046511627906977 [2024-06-28 04:26:30,398 INFO L175 Difference]: Start difference. First operand has 199 places, 284 transitions, 5188 flow. Second operand 10 states and 174 transitions. [2024-06-28 04:26:30,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 343 transitions, 6896 flow [2024-06-28 04:26:30,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 343 transitions, 6732 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-28 04:26:30,766 INFO L231 Difference]: Finished difference. Result has 208 places, 305 transitions, 6083 flow [2024-06-28 04:26:30,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4952, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6083, PETRI_PLACES=208, PETRI_TRANSITIONS=305} [2024-06-28 04:26:30,767 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2024-06-28 04:26:30,767 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 305 transitions, 6083 flow [2024-06-28 04:26:30,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:30,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:30,767 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] [2024-06-28 04:26:30,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 04:26:30,767 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)] === [2024-06-28 04:26:30,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:30,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1373293970, now seen corresponding path program 11 times [2024-06-28 04:26:30,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:30,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051481590] [2024-06-28 04:26:30,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:30,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:30,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:32,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:32,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051481590] [2024-06-28 04:26:32,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051481590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:32,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:32,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:26:32,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974266133] [2024-06-28 04:26:32,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:32,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:26:32,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:32,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:26:32,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:26:33,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:33,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 305 transitions, 6083 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:33,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:33,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:33,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:34,384 INFO L124 PetriNetUnfolderBase]: 2287/3702 cut-off events. [2024-06-28 04:26:34,384 INFO L125 PetriNetUnfolderBase]: For 381211/381211 co-relation queries the response was YES. [2024-06-28 04:26:34,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45682 conditions, 3702 events. 2287/3702 cut-off events. For 381211/381211 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21345 event pairs, 593 based on Foata normal form. 4/3704 useless extension candidates. Maximal degree in co-relation 45582. Up to 3524 conditions per place. [2024-06-28 04:26:34,426 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 302 selfloop transitions, 16 changer transitions 0/323 dead transitions. [2024-06-28 04:26:34,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 323 transitions, 6879 flow [2024-06-28 04:26:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:26:34,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:26:34,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-28 04:26:34,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35174418604651164 [2024-06-28 04:26:34,427 INFO L175 Difference]: Start difference. First operand has 208 places, 305 transitions, 6083 flow. Second operand 8 states and 121 transitions. [2024-06-28 04:26:34,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 323 transitions, 6879 flow [2024-06-28 04:26:34,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 323 transitions, 6800 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-28 04:26:34,894 INFO L231 Difference]: Finished difference. Result has 212 places, 306 transitions, 6073 flow [2024-06-28 04:26:34,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6004, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6073, PETRI_PLACES=212, PETRI_TRANSITIONS=306} [2024-06-28 04:26:34,894 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 168 predicate places. [2024-06-28 04:26:34,895 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 306 transitions, 6073 flow [2024-06-28 04:26:34,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:34,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:34,895 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] [2024-06-28 04:26:34,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 04:26:34,895 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)] === [2024-06-28 04:26:34,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:34,895 INFO L85 PathProgramCache]: Analyzing trace with hash -94526002, now seen corresponding path program 12 times [2024-06-28 04:26:34,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:34,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142528331] [2024-06-28 04:26:34,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:34,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:37,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:37,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142528331] [2024-06-28 04:26:37,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142528331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:37,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:37,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:37,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963163978] [2024-06-28 04:26:37,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:37,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:37,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:37,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:37,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:37,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:37,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 306 transitions, 6073 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:37,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:37,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:37,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:38,825 INFO L124 PetriNetUnfolderBase]: 2288/3694 cut-off events. [2024-06-28 04:26:38,825 INFO L125 PetriNetUnfolderBase]: For 391189/391189 co-relation queries the response was YES. [2024-06-28 04:26:38,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45866 conditions, 3694 events. 2288/3694 cut-off events. For 391189/391189 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 21281 event pairs, 597 based on Foata normal form. 5/3688 useless extension candidates. Maximal degree in co-relation 45763. Up to 3325 conditions per place. [2024-06-28 04:26:38,868 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 271 selfloop transitions, 62 changer transitions 0/338 dead transitions. [2024-06-28 04:26:38,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 338 transitions, 7445 flow [2024-06-28 04:26:38,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:26:38,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:26:38,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 04:26:38,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-28 04:26:38,869 INFO L175 Difference]: Start difference. First operand has 212 places, 306 transitions, 6073 flow. Second operand 8 states and 135 transitions. [2024-06-28 04:26:38,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 338 transitions, 7445 flow [2024-06-28 04:26:39,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 338 transitions, 7398 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 04:26:39,268 INFO L231 Difference]: Finished difference. Result has 216 places, 313 transitions, 6470 flow [2024-06-28 04:26:39,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6026, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6470, PETRI_PLACES=216, PETRI_TRANSITIONS=313} [2024-06-28 04:26:39,268 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-28 04:26:39,268 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 313 transitions, 6470 flow [2024-06-28 04:26:39,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:39,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:39,269 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] [2024-06-28 04:26:39,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 04:26:39,269 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)] === [2024-06-28 04:26:39,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:39,269 INFO L85 PathProgramCache]: Analyzing trace with hash 333816746, now seen corresponding path program 2 times [2024-06-28 04:26:39,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:39,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307979115] [2024-06-28 04:26:39,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:39,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:42,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:42,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307979115] [2024-06-28 04:26:42,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307979115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:42,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:42,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:42,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122756228] [2024-06-28 04:26:42,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:42,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:42,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:42,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:42,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:42,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:42,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 313 transitions, 6470 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:42,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:42,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:42,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:44,005 INFO L124 PetriNetUnfolderBase]: 2332/3780 cut-off events. [2024-06-28 04:26:44,005 INFO L125 PetriNetUnfolderBase]: For 421846/421846 co-relation queries the response was YES. [2024-06-28 04:26:44,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47458 conditions, 3780 events. 2332/3780 cut-off events. For 421846/421846 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 21937 event pairs, 595 based on Foata normal form. 12/3790 useless extension candidates. Maximal degree in co-relation 47353. Up to 3540 conditions per place. [2024-06-28 04:26:44,051 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 309 selfloop transitions, 20 changer transitions 0/334 dead transitions. [2024-06-28 04:26:44,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 334 transitions, 7362 flow [2024-06-28 04:26:44,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:26:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:26:44,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 04:26:44,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-28 04:26:44,052 INFO L175 Difference]: Start difference. First operand has 216 places, 313 transitions, 6470 flow. Second operand 8 states and 127 transitions. [2024-06-28 04:26:44,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 334 transitions, 7362 flow [2024-06-28 04:26:44,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 334 transitions, 7175 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-28 04:26:44,629 INFO L231 Difference]: Finished difference. Result has 219 places, 314 transitions, 6373 flow [2024-06-28 04:26:44,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6283, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6373, PETRI_PLACES=219, PETRI_TRANSITIONS=314} [2024-06-28 04:26:44,630 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-28 04:26:44,630 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 314 transitions, 6373 flow [2024-06-28 04:26:44,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:44,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:44,630 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] [2024-06-28 04:26:44,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 04:26:44,630 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)] === [2024-06-28 04:26:44,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:44,631 INFO L85 PathProgramCache]: Analyzing trace with hash 349053866, now seen corresponding path program 3 times [2024-06-28 04:26:44,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:44,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259100367] [2024-06-28 04:26:44,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:44,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:47,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:47,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:47,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259100367] [2024-06-28 04:26:47,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259100367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:47,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:47,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:47,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7130872] [2024-06-28 04:26:47,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:47,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:47,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:47,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:47,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:47,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:47,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 314 transitions, 6373 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:47,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:47,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:47,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:49,143 INFO L124 PetriNetUnfolderBase]: 2360/3828 cut-off events. [2024-06-28 04:26:49,143 INFO L125 PetriNetUnfolderBase]: For 433117/433117 co-relation queries the response was YES. [2024-06-28 04:26:49,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48104 conditions, 3828 events. 2360/3828 cut-off events. For 433117/433117 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22219 event pairs, 593 based on Foata normal form. 8/3834 useless extension candidates. Maximal degree in co-relation 47998. Up to 3546 conditions per place. [2024-06-28 04:26:49,187 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 312 selfloop transitions, 23 changer transitions 0/340 dead transitions. [2024-06-28 04:26:49,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 340 transitions, 7361 flow [2024-06-28 04:26:49,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:26:49,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:26:49,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-28 04:26:49,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3669250645994832 [2024-06-28 04:26:49,189 INFO L175 Difference]: Start difference. First operand has 219 places, 314 transitions, 6373 flow. Second operand 9 states and 142 transitions. [2024-06-28 04:26:49,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 340 transitions, 7361 flow [2024-06-28 04:26:49,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 340 transitions, 7325 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 04:26:49,638 INFO L231 Difference]: Finished difference. Result has 223 places, 315 transitions, 6433 flow [2024-06-28 04:26:49,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6337, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6433, PETRI_PLACES=223, PETRI_TRANSITIONS=315} [2024-06-28 04:26:49,638 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 179 predicate places. [2024-06-28 04:26:49,639 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 315 transitions, 6433 flow [2024-06-28 04:26:49,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:49,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:49,639 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] [2024-06-28 04:26:49,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 04:26:49,640 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)] === [2024-06-28 04:26:49,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:49,640 INFO L85 PathProgramCache]: Analyzing trace with hash -94279924, now seen corresponding path program 4 times [2024-06-28 04:26:49,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:49,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902563138] [2024-06-28 04:26:49,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:49,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:52,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:52,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902563138] [2024-06-28 04:26:52,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902563138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:52,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:52,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:52,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237429693] [2024-06-28 04:26:52,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:52,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:52,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:52,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:52,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:52,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:26:52,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 315 transitions, 6433 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:52,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:52,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:26:52,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:54,442 INFO L124 PetriNetUnfolderBase]: 2378/3846 cut-off events. [2024-06-28 04:26:54,442 INFO L125 PetriNetUnfolderBase]: For 449689/449689 co-relation queries the response was YES. [2024-06-28 04:26:54,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48503 conditions, 3846 events. 2378/3846 cut-off events. For 449689/449689 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22344 event pairs, 607 based on Foata normal form. 12/3847 useless extension candidates. Maximal degree in co-relation 48396. Up to 3504 conditions per place. [2024-06-28 04:26:54,489 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 289 selfloop transitions, 43 changer transitions 0/337 dead transitions. [2024-06-28 04:26:54,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 337 transitions, 7381 flow [2024-06-28 04:26:54,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:26:54,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:26:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 04:26:54,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-28 04:26:54,491 INFO L175 Difference]: Start difference. First operand has 223 places, 315 transitions, 6433 flow. Second operand 8 states and 135 transitions. [2024-06-28 04:26:54,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 337 transitions, 7381 flow [2024-06-28 04:26:55,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 337 transitions, 7325 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 04:26:55,034 INFO L231 Difference]: Finished difference. Result has 224 places, 316 transitions, 6517 flow [2024-06-28 04:26:55,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6377, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6517, PETRI_PLACES=224, PETRI_TRANSITIONS=316} [2024-06-28 04:26:55,034 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 180 predicate places. [2024-06-28 04:26:55,034 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 316 transitions, 6517 flow [2024-06-28 04:26:55,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:55,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:55,035 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] [2024-06-28 04:26:55,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 04:26:55,035 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)] === [2024-06-28 04:26:55,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:55,035 INFO L85 PathProgramCache]: Analyzing trace with hash -104778020, now seen corresponding path program 1 times [2024-06-28 04:26:55,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:55,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042542051] [2024-06-28 04:26:55,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:55,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:55,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:58,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:58,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042542051] [2024-06-28 04:26:58,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042542051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:58,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:58,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:58,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432887386] [2024-06-28 04:26:58,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:58,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:58,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:58,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:58,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:58,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 04:26:58,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 316 transitions, 6517 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) [2024-06-28 04:26:58,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:58,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 04:26:58,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:59,987 INFO L124 PetriNetUnfolderBase]: 2291/3771 cut-off events. [2024-06-28 04:26:59,987 INFO L125 PetriNetUnfolderBase]: For 458940/458985 co-relation queries the response was YES. [2024-06-28 04:27:00,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47748 conditions, 3771 events. 2291/3771 cut-off events. For 458940/458985 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22418 event pairs, 591 based on Foata normal form. 16/3779 useless extension candidates. Maximal degree in co-relation 47640. Up to 3367 conditions per place. [2024-06-28 04:27:00,033 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 287 selfloop transitions, 31 changer transitions 0/349 dead transitions. [2024-06-28 04:27:00,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 349 transitions, 7576 flow [2024-06-28 04:27:00,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:27:00,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:27:00,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 04:27:00,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-28 04:27:00,035 INFO L175 Difference]: Start difference. First operand has 224 places, 316 transitions, 6517 flow. Second operand 9 states and 151 transitions. [2024-06-28 04:27:00,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 349 transitions, 7576 flow [2024-06-28 04:27:00,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 349 transitions, 7488 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 04:27:00,499 INFO L231 Difference]: Finished difference. Result has 230 places, 323 transitions, 6706 flow [2024-06-28 04:27:00,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6429, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6706, PETRI_PLACES=230, PETRI_TRANSITIONS=323} [2024-06-28 04:27:00,500 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-28 04:27:00,500 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 323 transitions, 6706 flow [2024-06-28 04:27:00,500 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) [2024-06-28 04:27:00,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:00,500 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] [2024-06-28 04:27:00,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 04:27:00,500 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)] === [2024-06-28 04:27:00,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:00,501 INFO L85 PathProgramCache]: Analyzing trace with hash -104593322, now seen corresponding path program 1 times [2024-06-28 04:27:00,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:00,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549096194] [2024-06-28 04:27:00,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:00,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:04,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:04,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549096194] [2024-06-28 04:27:04,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549096194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:04,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:04,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:04,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604322183] [2024-06-28 04:27:04,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:04,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:04,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:04,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:04,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:04,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:04,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 323 transitions, 6706 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:04,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:04,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:04,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:06,169 INFO L124 PetriNetUnfolderBase]: 2387/3877 cut-off events. [2024-06-28 04:27:06,169 INFO L125 PetriNetUnfolderBase]: For 465346/465346 co-relation queries the response was YES. [2024-06-28 04:27:06,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49201 conditions, 3877 events. 2387/3877 cut-off events. For 465346/465346 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 22642 event pairs, 600 based on Foata normal form. 2/3877 useless extension candidates. Maximal degree in co-relation 49090. Up to 3686 conditions per place. [2024-06-28 04:27:06,219 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 321 selfloop transitions, 17 changer transitions 0/343 dead transitions. [2024-06-28 04:27:06,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 343 transitions, 7508 flow [2024-06-28 04:27:06,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:27:06,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:27:06,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-28 04:27:06,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-28 04:27:06,221 INFO L175 Difference]: Start difference. First operand has 230 places, 323 transitions, 6706 flow. Second operand 8 states and 124 transitions. [2024-06-28 04:27:06,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 343 transitions, 7508 flow [2024-06-28 04:27:06,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 343 transitions, 7435 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-28 04:27:06,786 INFO L231 Difference]: Finished difference. Result has 234 places, 325 transitions, 6748 flow [2024-06-28 04:27:06,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6633, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6748, PETRI_PLACES=234, PETRI_TRANSITIONS=325} [2024-06-28 04:27:06,787 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-28 04:27:06,787 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 325 transitions, 6748 flow [2024-06-28 04:27:06,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:06,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:06,787 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] [2024-06-28 04:27:06,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 04:27:06,787 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)] === [2024-06-28 04:27:06,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:06,787 INFO L85 PathProgramCache]: Analyzing trace with hash -104593570, now seen corresponding path program 1 times [2024-06-28 04:27:06,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:06,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75873278] [2024-06-28 04:27:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:06,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:10,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:10,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75873278] [2024-06-28 04:27:10,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75873278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:10,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:10,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:10,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467340021] [2024-06-28 04:27:10,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:10,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:10,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:10,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:10,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:10,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:10,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 325 transitions, 6748 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:10,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:10,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:10,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:11,465 INFO L124 PetriNetUnfolderBase]: 2382/3866 cut-off events. [2024-06-28 04:27:11,465 INFO L125 PetriNetUnfolderBase]: For 472116/472116 co-relation queries the response was YES. [2024-06-28 04:27:11,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49283 conditions, 3866 events. 2382/3866 cut-off events. For 472116/472116 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22552 event pairs, 598 based on Foata normal form. 1/3865 useless extension candidates. Maximal degree in co-relation 49170. Up to 3672 conditions per place. [2024-06-28 04:27:11,514 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 320 selfloop transitions, 23 changer transitions 0/348 dead transitions. [2024-06-28 04:27:11,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 348 transitions, 7603 flow [2024-06-28 04:27:11,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:27:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:27:11,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-28 04:27:11,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-28 04:27:11,515 INFO L175 Difference]: Start difference. First operand has 234 places, 325 transitions, 6748 flow. Second operand 8 states and 125 transitions. [2024-06-28 04:27:11,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 348 transitions, 7603 flow [2024-06-28 04:27:12,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 348 transitions, 7508 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-28 04:27:12,119 INFO L231 Difference]: Finished difference. Result has 236 places, 330 transitions, 6810 flow [2024-06-28 04:27:12,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6653, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6810, PETRI_PLACES=236, PETRI_TRANSITIONS=330} [2024-06-28 04:27:12,119 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-28 04:27:12,119 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 330 transitions, 6810 flow [2024-06-28 04:27:12,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:12,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:12,119 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] [2024-06-28 04:27:12,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 04:27:12,120 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)] === [2024-06-28 04:27:12,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:12,120 INFO L85 PathProgramCache]: Analyzing trace with hash 112588780, now seen corresponding path program 2 times [2024-06-28 04:27:12,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:12,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843315381] [2024-06-28 04:27:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:12,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:14,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:14,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843315381] [2024-06-28 04:27:14,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843315381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:14,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:14,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:14,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479438828] [2024-06-28 04:27:14,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:14,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:14,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:14,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:14,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:14,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:14,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 330 transitions, 6810 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:14,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:14,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:14,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:16,296 INFO L124 PetriNetUnfolderBase]: 2377/3859 cut-off events. [2024-06-28 04:27:16,296 INFO L125 PetriNetUnfolderBase]: For 484431/484431 co-relation queries the response was YES. [2024-06-28 04:27:16,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49304 conditions, 3859 events. 2377/3859 cut-off events. For 484431/484431 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22521 event pairs, 601 based on Foata normal form. 2/3859 useless extension candidates. Maximal degree in co-relation 49190. Up to 3667 conditions per place. [2024-06-28 04:27:16,345 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 321 selfloop transitions, 19 changer transitions 0/345 dead transitions. [2024-06-28 04:27:16,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 345 transitions, 7548 flow [2024-06-28 04:27:16,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:27:16,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:27:16,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-28 04:27:16,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3546511627906977 [2024-06-28 04:27:16,346 INFO L175 Difference]: Start difference. First operand has 236 places, 330 transitions, 6810 flow. Second operand 8 states and 122 transitions. [2024-06-28 04:27:16,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 345 transitions, 7548 flow [2024-06-28 04:27:16,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 345 transitions, 7486 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 04:27:16,933 INFO L231 Difference]: Finished difference. Result has 237 places, 330 transitions, 6791 flow [2024-06-28 04:27:16,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6748, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6791, PETRI_PLACES=237, PETRI_TRANSITIONS=330} [2024-06-28 04:27:16,934 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-28 04:27:16,934 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 330 transitions, 6791 flow [2024-06-28 04:27:16,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:16,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:16,934 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] [2024-06-28 04:27:16,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 04:27:16,935 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)] === [2024-06-28 04:27:16,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:16,935 INFO L85 PathProgramCache]: Analyzing trace with hash 340489930, now seen corresponding path program 3 times [2024-06-28 04:27:16,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:16,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17746510] [2024-06-28 04:27:16,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:16,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:20,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:20,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17746510] [2024-06-28 04:27:20,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17746510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:20,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:20,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:20,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607940331] [2024-06-28 04:27:20,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:20,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:20,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:20,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:20,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:20,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:20,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 330 transitions, 6791 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:20,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:20,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:20,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:21,961 INFO L124 PetriNetUnfolderBase]: 2372/3865 cut-off events. [2024-06-28 04:27:21,961 INFO L125 PetriNetUnfolderBase]: For 503708/503708 co-relation queries the response was YES. [2024-06-28 04:27:21,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49348 conditions, 3865 events. 2372/3865 cut-off events. For 503708/503708 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 22666 event pairs, 377 based on Foata normal form. 8/3871 useless extension candidates. Maximal degree in co-relation 49233. Up to 2966 conditions per place. [2024-06-28 04:27:22,009 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 226 selfloop transitions, 125 changer transitions 0/356 dead transitions. [2024-06-28 04:27:22,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 356 transitions, 7723 flow [2024-06-28 04:27:22,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:27:22,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:27:22,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-28 04:27:22,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-28 04:27:22,011 INFO L175 Difference]: Start difference. First operand has 237 places, 330 transitions, 6791 flow. Second operand 9 states and 146 transitions. [2024-06-28 04:27:22,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 356 transitions, 7723 flow [2024-06-28 04:27:22,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 356 transitions, 7518 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-28 04:27:22,460 INFO L231 Difference]: Finished difference. Result has 238 places, 331 transitions, 6962 flow [2024-06-28 04:27:22,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6554, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6962, PETRI_PLACES=238, PETRI_TRANSITIONS=331} [2024-06-28 04:27:22,460 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-28 04:27:22,460 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 331 transitions, 6962 flow [2024-06-28 04:27:22,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:22,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:22,460 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] [2024-06-28 04:27:22,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 04:27:22,460 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)] === [2024-06-28 04:27:22,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:22,461 INFO L85 PathProgramCache]: Analyzing trace with hash 349060810, now seen corresponding path program 4 times [2024-06-28 04:27:22,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:22,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035737687] [2024-06-28 04:27:22,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:22,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:25,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:25,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035737687] [2024-06-28 04:27:25,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035737687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:25,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:25,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:25,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456573793] [2024-06-28 04:27:25,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:25,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:25,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:25,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:25,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:25,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:25,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 331 transitions, 6962 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:25,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:25,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:25,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:26,628 INFO L124 PetriNetUnfolderBase]: 2369/3853 cut-off events. [2024-06-28 04:27:26,628 INFO L125 PetriNetUnfolderBase]: For 516638/516638 co-relation queries the response was YES. [2024-06-28 04:27:26,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50157 conditions, 3853 events. 2369/3853 cut-off events. For 516638/516638 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22435 event pairs, 580 based on Foata normal form. 2/3853 useless extension candidates. Maximal degree in co-relation 50042. Up to 3663 conditions per place. [2024-06-28 04:27:26,678 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 326 selfloop transitions, 16 changer transitions 0/347 dead transitions. [2024-06-28 04:27:26,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 347 transitions, 7719 flow [2024-06-28 04:27:26,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:27:26,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:27:26,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-28 04:27:26,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3488372093023256 [2024-06-28 04:27:26,680 INFO L175 Difference]: Start difference. First operand has 238 places, 331 transitions, 6962 flow. Second operand 8 states and 120 transitions. [2024-06-28 04:27:26,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 347 transitions, 7719 flow [2024-06-28 04:27:27,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 347 transitions, 7546 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-28 04:27:27,202 INFO L231 Difference]: Finished difference. Result has 239 places, 332 transitions, 6858 flow [2024-06-28 04:27:27,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6790, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6858, PETRI_PLACES=239, PETRI_TRANSITIONS=332} [2024-06-28 04:27:27,202 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-28 04:27:27,202 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 332 transitions, 6858 flow [2024-06-28 04:27:27,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:27,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:27,203 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] [2024-06-28 04:27:27,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 04:27:27,203 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)] === [2024-06-28 04:27:27,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:27,203 INFO L85 PathProgramCache]: Analyzing trace with hash -260526625, now seen corresponding path program 1 times [2024-06-28 04:27:27,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:27,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090640905] [2024-06-28 04:27:27,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:27,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:30,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:30,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090640905] [2024-06-28 04:27:30,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090640905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:30,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:30,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:27:30,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383995024] [2024-06-28 04:27:30,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:30,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:27:30,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:30,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:27:30,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:27:30,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:30,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 332 transitions, 6858 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:30,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:30,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:30,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:31,745 INFO L124 PetriNetUnfolderBase]: 2377/3874 cut-off events. [2024-06-28 04:27:31,746 INFO L125 PetriNetUnfolderBase]: For 529819/529819 co-relation queries the response was YES. [2024-06-28 04:27:31,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50176 conditions, 3874 events. 2377/3874 cut-off events. For 529819/529819 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22601 event pairs, 421 based on Foata normal form. 2/3874 useless extension candidates. Maximal degree in co-relation 50061. Up to 3526 conditions per place. [2024-06-28 04:27:31,874 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 336 selfloop transitions, 34 changer transitions 0/375 dead transitions. [2024-06-28 04:27:31,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 375 transitions, 8077 flow [2024-06-28 04:27:31,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:27:31,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:27:31,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:27:31,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-28 04:27:31,875 INFO L175 Difference]: Start difference. First operand has 239 places, 332 transitions, 6858 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:27:31,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 375 transitions, 8077 flow [2024-06-28 04:27:32,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 375 transitions, 8036 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 04:27:32,392 INFO L231 Difference]: Finished difference. Result has 243 places, 341 transitions, 7171 flow [2024-06-28 04:27:32,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6817, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7171, PETRI_PLACES=243, PETRI_TRANSITIONS=341} [2024-06-28 04:27:32,392 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-28 04:27:32,393 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 341 transitions, 7171 flow [2024-06-28 04:27:32,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:32,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:32,393 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] [2024-06-28 04:27:32,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 04:27:32,393 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)] === [2024-06-28 04:27:32,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:32,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1483603721, now seen corresponding path program 2 times [2024-06-28 04:27:32,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:32,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267208356] [2024-06-28 04:27:32,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:32,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:35,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:35,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267208356] [2024-06-28 04:27:35,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267208356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:35,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:35,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:27:35,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584307256] [2024-06-28 04:27:35,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:35,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:27:35,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:35,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:27:35,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:27:35,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:35,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 341 transitions, 7171 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:35,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:35,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:35,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:36,856 INFO L124 PetriNetUnfolderBase]: 2390/3891 cut-off events. [2024-06-28 04:27:36,856 INFO L125 PetriNetUnfolderBase]: For 549077/549077 co-relation queries the response was YES. [2024-06-28 04:27:36,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51005 conditions, 3891 events. 2390/3891 cut-off events. For 549077/549077 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22707 event pairs, 572 based on Foata normal form. 2/3891 useless extension candidates. Maximal degree in co-relation 50888. Up to 3629 conditions per place. [2024-06-28 04:27:36,904 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 336 selfloop transitions, 33 changer transitions 0/374 dead transitions. [2024-06-28 04:27:36,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 374 transitions, 8132 flow [2024-06-28 04:27:36,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:27:36,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:27:36,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 04:27:36,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-28 04:27:36,905 INFO L175 Difference]: Start difference. First operand has 243 places, 341 transitions, 7171 flow. Second operand 8 states and 139 transitions. [2024-06-28 04:27:36,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 374 transitions, 8132 flow [2024-06-28 04:27:37,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 374 transitions, 8032 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-28 04:27:37,597 INFO L231 Difference]: Finished difference. Result has 249 places, 346 transitions, 7285 flow [2024-06-28 04:27:37,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7085, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7285, PETRI_PLACES=249, PETRI_TRANSITIONS=346} [2024-06-28 04:27:37,597 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-28 04:27:37,598 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 346 transitions, 7285 flow [2024-06-28 04:27:37,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:37,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:37,598 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] [2024-06-28 04:27:37,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 04:27:37,598 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)] === [2024-06-28 04:27:37,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:37,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1874978969, now seen corresponding path program 1 times [2024-06-28 04:27:37,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:37,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82335055] [2024-06-28 04:27:37,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:37,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:40,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:40,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:40,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82335055] [2024-06-28 04:27:40,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82335055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:40,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:40,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:27:40,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63314410] [2024-06-28 04:27:40,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:40,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:27:40,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:40,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:27:40,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:27:40,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:40,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 346 transitions, 7285 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:40,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:40,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:40,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:41,699 INFO L124 PetriNetUnfolderBase]: 2395/3900 cut-off events. [2024-06-28 04:27:41,699 INFO L125 PetriNetUnfolderBase]: For 563588/563588 co-relation queries the response was YES. [2024-06-28 04:27:41,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51345 conditions, 3900 events. 2395/3900 cut-off events. For 563588/563588 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22792 event pairs, 563 based on Foata normal form. 1/3899 useless extension candidates. Maximal degree in co-relation 51226. Up to 3637 conditions per place. [2024-06-28 04:27:41,752 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 351 selfloop transitions, 24 changer transitions 0/380 dead transitions. [2024-06-28 04:27:41,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 380 transitions, 8258 flow [2024-06-28 04:27:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:27:41,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:27:41,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 04:27:41,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-28 04:27:41,753 INFO L175 Difference]: Start difference. First operand has 249 places, 346 transitions, 7285 flow. Second operand 8 states and 139 transitions. [2024-06-28 04:27:41,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 380 transitions, 8258 flow [2024-06-28 04:27:42,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 380 transitions, 8178 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 04:27:42,514 INFO L231 Difference]: Finished difference. Result has 253 places, 349 transitions, 7393 flow [2024-06-28 04:27:42,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7205, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7393, PETRI_PLACES=253, PETRI_TRANSITIONS=349} [2024-06-28 04:27:42,515 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-28 04:27:42,515 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 349 transitions, 7393 flow [2024-06-28 04:27:42,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:42,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:42,515 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] [2024-06-28 04:27:42,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 04:27:42,515 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)] === [2024-06-28 04:27:42,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:42,515 INFO L85 PathProgramCache]: Analyzing trace with hash -6563593, now seen corresponding path program 3 times [2024-06-28 04:27:42,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:42,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551216315] [2024-06-28 04:27:42,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:42,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:42,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:45,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:45,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551216315] [2024-06-28 04:27:45,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551216315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:45,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:45,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:27:45,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712825175] [2024-06-28 04:27:45,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:45,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:27:45,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:45,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:27:45,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:27:45,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:45,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 349 transitions, 7393 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:45,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:45,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:45,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:46,857 INFO L124 PetriNetUnfolderBase]: 2403/3913 cut-off events. [2024-06-28 04:27:46,857 INFO L125 PetriNetUnfolderBase]: For 583661/583661 co-relation queries the response was YES. [2024-06-28 04:27:46,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51929 conditions, 3913 events. 2403/3913 cut-off events. For 583661/583661 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 22920 event pairs, 578 based on Foata normal form. 2/3913 useless extension candidates. Maximal degree in co-relation 51809. Up to 3648 conditions per place. [2024-06-28 04:27:46,908 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 335 selfloop transitions, 33 changer transitions 0/373 dead transitions. [2024-06-28 04:27:46,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 373 transitions, 8264 flow [2024-06-28 04:27:46,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:27:46,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:27:46,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 04:27:46,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-28 04:27:46,909 INFO L175 Difference]: Start difference. First operand has 253 places, 349 transitions, 7393 flow. Second operand 8 states and 132 transitions. [2024-06-28 04:27:46,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 373 transitions, 8264 flow [2024-06-28 04:27:47,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 373 transitions, 8133 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-28 04:27:47,663 INFO L231 Difference]: Finished difference. Result has 257 places, 352 transitions, 7422 flow [2024-06-28 04:27:47,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7262, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7422, PETRI_PLACES=257, PETRI_TRANSITIONS=352} [2024-06-28 04:27:47,663 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-28 04:27:47,663 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 352 transitions, 7422 flow [2024-06-28 04:27:47,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:47,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:47,664 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] [2024-06-28 04:27:47,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 04:27:47,664 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)] === [2024-06-28 04:27:47,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:47,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1197908841, now seen corresponding path program 2 times [2024-06-28 04:27:47,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:47,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260789588] [2024-06-28 04:27:47,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:47,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:50,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:50,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260789588] [2024-06-28 04:27:50,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260789588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:50,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:50,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:27:50,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444472009] [2024-06-28 04:27:50,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:50,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:27:50,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:50,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:27:50,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:27:50,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:50,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 352 transitions, 7422 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:50,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:50,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:50,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:52,017 INFO L124 PetriNetUnfolderBase]: 2408/3925 cut-off events. [2024-06-28 04:27:52,017 INFO L125 PetriNetUnfolderBase]: For 599220/599220 co-relation queries the response was YES. [2024-06-28 04:27:52,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52292 conditions, 3925 events. 2408/3925 cut-off events. For 599220/599220 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 23026 event pairs, 571 based on Foata normal form. 1/3924 useless extension candidates. Maximal degree in co-relation 52170. Up to 3680 conditions per place. [2024-06-28 04:27:52,068 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 353 selfloop transitions, 21 changer transitions 0/379 dead transitions. [2024-06-28 04:27:52,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 379 transitions, 8377 flow [2024-06-28 04:27:52,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:27:52,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:27:52,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 04:27:52,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-28 04:27:52,070 INFO L175 Difference]: Start difference. First operand has 257 places, 352 transitions, 7422 flow. Second operand 8 states and 133 transitions. [2024-06-28 04:27:52,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 379 transitions, 8377 flow [2024-06-28 04:27:52,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 379 transitions, 8282 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 04:27:52,758 INFO L231 Difference]: Finished difference. Result has 260 places, 355 transitions, 7514 flow [2024-06-28 04:27:52,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7327, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7514, PETRI_PLACES=260, PETRI_TRANSITIONS=355} [2024-06-28 04:27:52,759 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-28 04:27:52,759 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 355 transitions, 7514 flow [2024-06-28 04:27:52,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:52,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:52,759 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] [2024-06-28 04:27:52,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 04:27:52,760 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)] === [2024-06-28 04:27:52,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:52,760 INFO L85 PathProgramCache]: Analyzing trace with hash 33746079, now seen corresponding path program 1 times [2024-06-28 04:27:52,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:52,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758638052] [2024-06-28 04:27:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:52,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:55,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:55,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758638052] [2024-06-28 04:27:55,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758638052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:55,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:55,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:55,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630898471] [2024-06-28 04:27:55,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:55,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:55,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:55,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:55,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:55,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:27:55,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 355 transitions, 7514 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:55,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:55,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:27:55,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:57,094 INFO L124 PetriNetUnfolderBase]: 2418/3940 cut-off events. [2024-06-28 04:27:57,095 INFO L125 PetriNetUnfolderBase]: For 618231/618231 co-relation queries the response was YES. [2024-06-28 04:27:57,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52874 conditions, 3940 events. 2418/3940 cut-off events. For 618231/618231 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 23073 event pairs, 569 based on Foata normal form. 2/3939 useless extension candidates. Maximal degree in co-relation 52751. Up to 3663 conditions per place. [2024-06-28 04:27:57,149 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 350 selfloop transitions, 29 changer transitions 0/384 dead transitions. [2024-06-28 04:27:57,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 384 transitions, 8464 flow [2024-06-28 04:27:57,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:27:57,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:27:57,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-28 04:27:57,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-28 04:27:57,150 INFO L175 Difference]: Start difference. First operand has 260 places, 355 transitions, 7514 flow. Second operand 9 states and 147 transitions. [2024-06-28 04:27:57,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 384 transitions, 8464 flow [2024-06-28 04:27:57,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 384 transitions, 8324 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-28 04:27:57,852 INFO L231 Difference]: Finished difference. Result has 263 places, 359 transitions, 7563 flow [2024-06-28 04:27:57,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7374, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7563, PETRI_PLACES=263, PETRI_TRANSITIONS=359} [2024-06-28 04:27:57,853 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-28 04:27:57,853 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 359 transitions, 7563 flow [2024-06-28 04:27:57,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:57,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:57,853 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] [2024-06-28 04:27:57,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 04:27:57,853 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)] === [2024-06-28 04:27:57,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:57,854 INFO L85 PathProgramCache]: Analyzing trace with hash 33751814, now seen corresponding path program 1 times [2024-06-28 04:27:57,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:57,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619366364] [2024-06-28 04:27:57,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:57,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:00,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:00,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619366364] [2024-06-28 04:28:00,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619366364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:00,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:00,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:28:00,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323689727] [2024-06-28 04:28:00,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:00,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:28:00,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:00,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:28:00,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:28:00,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:00,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 359 transitions, 7563 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:00,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:00,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:00,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:02,499 INFO L124 PetriNetUnfolderBase]: 2508/4076 cut-off events. [2024-06-28 04:28:02,499 INFO L125 PetriNetUnfolderBase]: For 656808/656808 co-relation queries the response was YES. [2024-06-28 04:28:02,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55358 conditions, 4076 events. 2508/4076 cut-off events. For 656808/656808 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23827 event pairs, 433 based on Foata normal form. 5/4079 useless extension candidates. Maximal degree in co-relation 55234. Up to 3004 conditions per place. [2024-06-28 04:28:02,549 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 266 selfloop transitions, 157 changer transitions 0/428 dead transitions. [2024-06-28 04:28:02,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 428 transitions, 9387 flow [2024-06-28 04:28:02,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:28:02,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:28:02,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 205 transitions. [2024-06-28 04:28:02,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39728682170542634 [2024-06-28 04:28:02,550 INFO L175 Difference]: Start difference. First operand has 263 places, 359 transitions, 7563 flow. Second operand 12 states and 205 transitions. [2024-06-28 04:28:02,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 428 transitions, 9387 flow [2024-06-28 04:28:03,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 428 transitions, 9235 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-28 04:28:03,388 INFO L231 Difference]: Finished difference. Result has 271 places, 379 transitions, 8384 flow [2024-06-28 04:28:03,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7411, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8384, PETRI_PLACES=271, PETRI_TRANSITIONS=379} [2024-06-28 04:28:03,389 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-28 04:28:03,389 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 379 transitions, 8384 flow [2024-06-28 04:28:03,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:03,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:03,389 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] [2024-06-28 04:28:03,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 04:28:03,389 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)] === [2024-06-28 04:28:03,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:03,390 INFO L85 PathProgramCache]: Analyzing trace with hash 33746234, now seen corresponding path program 2 times [2024-06-28 04:28:03,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:03,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848378302] [2024-06-28 04:28:03,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:03,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:05,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:05,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848378302] [2024-06-28 04:28:05,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848378302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:05,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:05,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:28:05,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360103675] [2024-06-28 04:28:05,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:05,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:28:05,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:05,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:28:05,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:28:05,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:05,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 379 transitions, 8384 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:05,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:05,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:05,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:07,906 INFO L124 PetriNetUnfolderBase]: 2579/4177 cut-off events. [2024-06-28 04:28:07,907 INFO L125 PetriNetUnfolderBase]: For 714148/714148 co-relation queries the response was YES. [2024-06-28 04:28:07,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58791 conditions, 4177 events. 2579/4177 cut-off events. For 714148/714148 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 24513 event pairs, 442 based on Foata normal form. 6/4181 useless extension candidates. Maximal degree in co-relation 58665. Up to 3012 conditions per place. [2024-06-28 04:28:07,961 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 254 selfloop transitions, 172 changer transitions 0/431 dead transitions. [2024-06-28 04:28:07,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 431 transitions, 9948 flow [2024-06-28 04:28:07,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:28:07,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:28:07,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-28 04:28:07,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-28 04:28:07,962 INFO L175 Difference]: Start difference. First operand has 271 places, 379 transitions, 8384 flow. Second operand 9 states and 162 transitions. [2024-06-28 04:28:07,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 431 transitions, 9948 flow [2024-06-28 04:28:08,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 431 transitions, 9782 flow, removed 66 selfloop flow, removed 8 redundant places. [2024-06-28 04:28:08,742 INFO L231 Difference]: Finished difference. Result has 273 places, 392 transitions, 9079 flow [2024-06-28 04:28:08,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8218, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9079, PETRI_PLACES=273, PETRI_TRANSITIONS=392} [2024-06-28 04:28:08,743 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-28 04:28:08,743 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 392 transitions, 9079 flow [2024-06-28 04:28:08,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:08,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:08,743 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] [2024-06-28 04:28:08,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 04:28:08,743 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)] === [2024-06-28 04:28:08,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:08,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1359885791, now seen corresponding path program 4 times [2024-06-28 04:28:08,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:08,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716886938] [2024-06-28 04:28:08,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:08,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:11,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:11,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716886938] [2024-06-28 04:28:11,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716886938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:11,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:11,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:28:11,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380863841] [2024-06-28 04:28:11,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:11,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:28:11,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:11,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:28:11,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:28:11,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:11,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 392 transitions, 9079 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:11,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:11,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:11,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:13,711 INFO L124 PetriNetUnfolderBase]: 2574/4157 cut-off events. [2024-06-28 04:28:13,711 INFO L125 PetriNetUnfolderBase]: For 745918/745918 co-relation queries the response was YES. [2024-06-28 04:28:13,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60608 conditions, 4157 events. 2574/4157 cut-off events. For 745918/745918 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 24356 event pairs, 591 based on Foata normal form. 2/4148 useless extension candidates. Maximal degree in co-relation 60480. Up to 3896 conditions per place. [2024-06-28 04:28:13,766 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 367 selfloop transitions, 33 changer transitions 0/405 dead transitions. [2024-06-28 04:28:13,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 405 transitions, 9913 flow [2024-06-28 04:28:13,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:28:13,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:28:13,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-28 04:28:13,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-28 04:28:13,767 INFO L175 Difference]: Start difference. First operand has 273 places, 392 transitions, 9079 flow. Second operand 8 states and 124 transitions. [2024-06-28 04:28:13,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 405 transitions, 9913 flow [2024-06-28 04:28:14,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 405 transitions, 9769 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-28 04:28:14,716 INFO L231 Difference]: Finished difference. Result has 276 places, 392 transitions, 9006 flow [2024-06-28 04:28:14,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8935, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9006, PETRI_PLACES=276, PETRI_TRANSITIONS=392} [2024-06-28 04:28:14,716 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-28 04:28:14,716 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 392 transitions, 9006 flow [2024-06-28 04:28:14,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:14,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:14,717 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] [2024-06-28 04:28:14,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 04:28:14,717 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)] === [2024-06-28 04:28:14,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:14,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2025829973, now seen corresponding path program 3 times [2024-06-28 04:28:14,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:14,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067051483] [2024-06-28 04:28:14,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:14,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:17,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:17,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067051483] [2024-06-28 04:28:17,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067051483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:17,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:17,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:28:17,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910073187] [2024-06-28 04:28:17,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:17,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:28:17,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:17,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:28:17,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:28:17,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:17,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 392 transitions, 9006 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:17,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:17,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:17,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:19,193 INFO L124 PetriNetUnfolderBase]: 2579/4176 cut-off events. [2024-06-28 04:28:19,193 INFO L125 PetriNetUnfolderBase]: For 757196/757196 co-relation queries the response was YES. [2024-06-28 04:28:19,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60622 conditions, 4176 events. 2579/4176 cut-off events. For 757196/757196 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 24483 event pairs, 576 based on Foata normal form. 1/4170 useless extension candidates. Maximal degree in co-relation 60492. Up to 3895 conditions per place. [2024-06-28 04:28:19,253 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 386 selfloop transitions, 25 changer transitions 0/416 dead transitions. [2024-06-28 04:28:19,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 416 transitions, 10045 flow [2024-06-28 04:28:19,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:28:19,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:28:19,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 04:28:19,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-28 04:28:19,254 INFO L175 Difference]: Start difference. First operand has 276 places, 392 transitions, 9006 flow. Second operand 8 states and 131 transitions. [2024-06-28 04:28:19,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 416 transitions, 10045 flow [2024-06-28 04:28:20,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 416 transitions, 9922 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-28 04:28:20,499 INFO L231 Difference]: Finished difference. Result has 275 places, 395 transitions, 9096 flow [2024-06-28 04:28:20,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8883, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9096, PETRI_PLACES=275, PETRI_TRANSITIONS=395} [2024-06-28 04:28:20,500 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-28 04:28:20,500 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 395 transitions, 9096 flow [2024-06-28 04:28:20,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:20,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:20,501 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] [2024-06-28 04:28:20,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 04:28:20,501 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)] === [2024-06-28 04:28:20,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:20,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1363115069, now seen corresponding path program 4 times [2024-06-28 04:28:20,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:20,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425521674] [2024-06-28 04:28:20,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:20,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:23,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:23,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425521674] [2024-06-28 04:28:23,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425521674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:23,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:23,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:28:23,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38887304] [2024-06-28 04:28:23,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:23,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:28:23,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:23,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:28:23,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:28:23,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:23,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 395 transitions, 9096 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:23,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:23,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:23,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:24,906 INFO L124 PetriNetUnfolderBase]: 2576/4172 cut-off events. [2024-06-28 04:28:24,906 INFO L125 PetriNetUnfolderBase]: For 773398/773398 co-relation queries the response was YES. [2024-06-28 04:28:24,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60900 conditions, 4172 events. 2576/4172 cut-off events. For 773398/773398 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 24498 event pairs, 576 based on Foata normal form. 1/4166 useless extension candidates. Maximal degree in co-relation 60770. Up to 3873 conditions per place. [2024-06-28 04:28:24,964 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 372 selfloop transitions, 38 changer transitions 0/415 dead transitions. [2024-06-28 04:28:24,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 415 transitions, 10125 flow [2024-06-28 04:28:24,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:28:24,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:28:24,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 04:28:24,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-28 04:28:24,965 INFO L175 Difference]: Start difference. First operand has 275 places, 395 transitions, 9096 flow. Second operand 8 states and 128 transitions. [2024-06-28 04:28:24,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 415 transitions, 10125 flow [2024-06-28 04:28:26,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 415 transitions, 9965 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-28 04:28:26,027 INFO L231 Difference]: Finished difference. Result has 277 places, 398 transitions, 9181 flow [2024-06-28 04:28:26,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8936, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9181, PETRI_PLACES=277, PETRI_TRANSITIONS=398} [2024-06-28 04:28:26,027 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-28 04:28:26,027 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 398 transitions, 9181 flow [2024-06-28 04:28:26,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:26,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:26,027 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] [2024-06-28 04:28:26,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 04:28:26,028 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)] === [2024-06-28 04:28:26,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:26,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1356125300, now seen corresponding path program 3 times [2024-06-28 04:28:26,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:26,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310906028] [2024-06-28 04:28:26,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:26,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:28,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:28,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310906028] [2024-06-28 04:28:28,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310906028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:28,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:28,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:28:28,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764456488] [2024-06-28 04:28:28,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:28,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:28:28,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:28,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:28:28,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:28:28,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:28,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 398 transitions, 9181 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:28,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:28,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:28,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:30,496 INFO L124 PetriNetUnfolderBase]: 2650/4279 cut-off events. [2024-06-28 04:28:30,496 INFO L125 PetriNetUnfolderBase]: For 821639/821639 co-relation queries the response was YES. [2024-06-28 04:28:30,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63375 conditions, 4279 events. 2650/4279 cut-off events. For 821639/821639 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 25162 event pairs, 566 based on Foata normal form. 6/4278 useless extension candidates. Maximal degree in co-relation 63244. Up to 3926 conditions per place. [2024-06-28 04:28:30,555 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 398 selfloop transitions, 45 changer transitions 0/448 dead transitions. [2024-06-28 04:28:30,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 448 transitions, 11086 flow [2024-06-28 04:28:30,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:28:30,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:28:30,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-28 04:28:30,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-28 04:28:30,556 INFO L175 Difference]: Start difference. First operand has 277 places, 398 transitions, 9181 flow. Second operand 9 states and 150 transitions. [2024-06-28 04:28:30,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 448 transitions, 11086 flow [2024-06-28 04:28:31,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 448 transitions, 10894 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-28 04:28:31,638 INFO L231 Difference]: Finished difference. Result has 281 places, 416 transitions, 9685 flow [2024-06-28 04:28:31,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8989, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9685, PETRI_PLACES=281, PETRI_TRANSITIONS=416} [2024-06-28 04:28:31,639 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-28 04:28:31,639 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 416 transitions, 9685 flow [2024-06-28 04:28:31,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:31,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:31,639 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] [2024-06-28 04:28:31,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 04:28:31,639 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)] === [2024-06-28 04:28:31,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:31,640 INFO L85 PathProgramCache]: Analyzing trace with hash -436352342, now seen corresponding path program 4 times [2024-06-28 04:28:31,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:31,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701888876] [2024-06-28 04:28:31,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:31,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:31,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:34,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:34,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701888876] [2024-06-28 04:28:34,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701888876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:34,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:34,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:28:34,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941209153] [2024-06-28 04:28:34,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:34,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:28:34,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:34,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:28:34,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:28:34,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:34,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 416 transitions, 9685 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:34,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:34,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:34,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:36,211 INFO L124 PetriNetUnfolderBase]: 2700/4354 cut-off events. [2024-06-28 04:28:36,211 INFO L125 PetriNetUnfolderBase]: For 852400/852400 co-relation queries the response was YES. [2024-06-28 04:28:36,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65024 conditions, 4354 events. 2700/4354 cut-off events. For 852400/852400 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 25545 event pairs, 451 based on Foata normal form. 5/4352 useless extension candidates. Maximal degree in co-relation 64891. Up to 3248 conditions per place. [2024-06-28 04:28:36,271 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 289 selfloop transitions, 169 changer transitions 0/463 dead transitions. [2024-06-28 04:28:36,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 463 transitions, 11290 flow [2024-06-28 04:28:36,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:28:36,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:28:36,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-28 04:28:36,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-28 04:28:36,273 INFO L175 Difference]: Start difference. First operand has 281 places, 416 transitions, 9685 flow. Second operand 10 states and 172 transitions. [2024-06-28 04:28:36,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 463 transitions, 11290 flow [2024-06-28 04:28:37,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 463 transitions, 11089 flow, removed 89 selfloop flow, removed 4 redundant places. [2024-06-28 04:28:37,315 INFO L231 Difference]: Finished difference. Result has 288 places, 428 transitions, 10347 flow [2024-06-28 04:28:37,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9484, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10347, PETRI_PLACES=288, PETRI_TRANSITIONS=428} [2024-06-28 04:28:37,316 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-28 04:28:37,316 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 428 transitions, 10347 flow [2024-06-28 04:28:37,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:37,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:37,316 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] [2024-06-28 04:28:37,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 04:28:37,316 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)] === [2024-06-28 04:28:37,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:37,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1758241951, now seen corresponding path program 2 times [2024-06-28 04:28:37,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:37,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362496203] [2024-06-28 04:28:37,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:37,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:40,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:40,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362496203] [2024-06-28 04:28:40,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362496203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:40,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:40,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:28:40,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178374414] [2024-06-28 04:28:40,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:40,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:28:40,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:40,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:28:40,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:28:40,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:40,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 428 transitions, 10347 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:40,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:40,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:40,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:42,104 INFO L124 PetriNetUnfolderBase]: 2710/4368 cut-off events. [2024-06-28 04:28:42,104 INFO L125 PetriNetUnfolderBase]: For 887136/887136 co-relation queries the response was YES. [2024-06-28 04:28:42,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67129 conditions, 4368 events. 2710/4368 cut-off events. For 887136/887136 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 25643 event pairs, 577 based on Foata normal form. 2/4363 useless extension candidates. Maximal degree in co-relation 66993. Up to 4074 conditions per place. [2024-06-28 04:28:42,166 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 419 selfloop transitions, 30 changer transitions 0/454 dead transitions. [2024-06-28 04:28:42,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 454 transitions, 11457 flow [2024-06-28 04:28:42,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:28:42,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:28:42,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-28 04:28:42,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37467700258397935 [2024-06-28 04:28:42,168 INFO L175 Difference]: Start difference. First operand has 288 places, 428 transitions, 10347 flow. Second operand 9 states and 145 transitions. [2024-06-28 04:28:42,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 454 transitions, 11457 flow [2024-06-28 04:28:43,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 454 transitions, 11350 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-28 04:28:43,381 INFO L231 Difference]: Finished difference. Result has 293 places, 432 transitions, 10459 flow [2024-06-28 04:28:43,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10240, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10459, PETRI_PLACES=293, PETRI_TRANSITIONS=432} [2024-06-28 04:28:43,381 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-28 04:28:43,381 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 432 transitions, 10459 flow [2024-06-28 04:28:43,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:43,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:43,381 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] [2024-06-28 04:28:43,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 04:28:43,382 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)] === [2024-06-28 04:28:43,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:43,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1052351004, now seen corresponding path program 5 times [2024-06-28 04:28:43,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:43,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656013280] [2024-06-28 04:28:43,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:43,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:45,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:45,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:45,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656013280] [2024-06-28 04:28:45,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656013280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:45,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:45,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:28:45,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128092221] [2024-06-28 04:28:45,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:45,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:28:45,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:45,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:28:45,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:28:45,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:45,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 432 transitions, 10459 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:45,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:45,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:45,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:48,542 INFO L124 PetriNetUnfolderBase]: 2840/4579 cut-off events. [2024-06-28 04:28:48,543 INFO L125 PetriNetUnfolderBase]: For 975589/975589 co-relation queries the response was YES. [2024-06-28 04:28:48,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71243 conditions, 4579 events. 2840/4579 cut-off events. For 975589/975589 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 27287 event pairs, 354 based on Foata normal form. 4/4581 useless extension candidates. Maximal degree in co-relation 71105. Up to 3501 conditions per place. [2024-06-28 04:28:48,610 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 310 selfloop transitions, 186 changer transitions 0/501 dead transitions. [2024-06-28 04:28:48,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 501 transitions, 13147 flow [2024-06-28 04:28:48,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:28:48,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:28:48,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 196 transitions. [2024-06-28 04:28:48,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-28 04:28:48,611 INFO L175 Difference]: Start difference. First operand has 293 places, 432 transitions, 10459 flow. Second operand 12 states and 196 transitions. [2024-06-28 04:28:48,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 501 transitions, 13147 flow [2024-06-28 04:28:49,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 501 transitions, 12956 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-28 04:28:49,877 INFO L231 Difference]: Finished difference. Result has 301 places, 463 transitions, 11859 flow [2024-06-28 04:28:49,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10268, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11859, PETRI_PLACES=301, PETRI_TRANSITIONS=463} [2024-06-28 04:28:49,878 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 257 predicate places. [2024-06-28 04:28:49,878 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 463 transitions, 11859 flow [2024-06-28 04:28:49,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:49,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:49,878 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] [2024-06-28 04:28:49,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 04:28:49,879 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)] === [2024-06-28 04:28:49,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:49,879 INFO L85 PathProgramCache]: Analyzing trace with hash 784489128, now seen corresponding path program 6 times [2024-06-28 04:28:49,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:49,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157499756] [2024-06-28 04:28:49,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:49,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:49,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:52,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:52,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157499756] [2024-06-28 04:28:52,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157499756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:52,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:52,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:28:52,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355342903] [2024-06-28 04:28:52,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:52,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:28:52,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:52,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:28:52,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:28:52,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:52,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 463 transitions, 11859 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:52,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:52,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:52,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:54,454 INFO L124 PetriNetUnfolderBase]: 2828/4556 cut-off events. [2024-06-28 04:28:54,454 INFO L125 PetriNetUnfolderBase]: For 1004053/1004053 co-relation queries the response was YES. [2024-06-28 04:28:54,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72954 conditions, 4556 events. 2828/4556 cut-off events. For 1004053/1004053 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 26945 event pairs, 595 based on Foata normal form. 4/4558 useless extension candidates. Maximal degree in co-relation 72812. Up to 4306 conditions per place. [2024-06-28 04:28:54,524 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 451 selfloop transitions, 29 changer transitions 0/485 dead transitions. [2024-06-28 04:28:54,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 485 transitions, 12980 flow [2024-06-28 04:28:54,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:28:54,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:28:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-28 04:28:54,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3669250645994832 [2024-06-28 04:28:54,525 INFO L175 Difference]: Start difference. First operand has 301 places, 463 transitions, 11859 flow. Second operand 9 states and 142 transitions. [2024-06-28 04:28:54,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 485 transitions, 12980 flow [2024-06-28 04:28:55,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 485 transitions, 12773 flow, removed 97 selfloop flow, removed 4 redundant places. [2024-06-28 04:28:55,937 INFO L231 Difference]: Finished difference. Result has 307 places, 464 transitions, 11772 flow [2024-06-28 04:28:55,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11652, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11772, PETRI_PLACES=307, PETRI_TRANSITIONS=464} [2024-06-28 04:28:55,938 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-28 04:28:55,938 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 464 transitions, 11772 flow [2024-06-28 04:28:55,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:55,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:55,938 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] [2024-06-28 04:28:55,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 04:28:55,938 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)] === [2024-06-28 04:28:55,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:55,939 INFO L85 PathProgramCache]: Analyzing trace with hash 778948033, now seen corresponding path program 3 times [2024-06-28 04:28:55,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:55,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254413548] [2024-06-28 04:28:55,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:55,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:58,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:58,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254413548] [2024-06-28 04:28:58,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254413548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:58,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:58,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:28:58,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857072320] [2024-06-28 04:28:58,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:58,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:28:58,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:58,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:28:58,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:28:58,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:28:58,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 464 transitions, 11772 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:58,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:58,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:28:58,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:00,607 INFO L124 PetriNetUnfolderBase]: 2833/4563 cut-off events. [2024-06-28 04:29:00,607 INFO L125 PetriNetUnfolderBase]: For 1014213/1014213 co-relation queries the response was YES. [2024-06-28 04:29:00,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73090 conditions, 4563 events. 2833/4563 cut-off events. For 1014213/1014213 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 27017 event pairs, 588 based on Foata normal form. 1/4557 useless extension candidates. Maximal degree in co-relation 72944. Up to 4227 conditions per place. [2024-06-28 04:29:00,679 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 432 selfloop transitions, 50 changer transitions 0/487 dead transitions. [2024-06-28 04:29:00,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 487 transitions, 12928 flow [2024-06-28 04:29:00,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:29:00,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:29:00,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-28 04:29:00,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3669250645994832 [2024-06-28 04:29:00,680 INFO L175 Difference]: Start difference. First operand has 307 places, 464 transitions, 11772 flow. Second operand 9 states and 142 transitions. [2024-06-28 04:29:00,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 487 transitions, 12928 flow [2024-06-28 04:29:02,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 487 transitions, 12868 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 04:29:02,222 INFO L231 Difference]: Finished difference. Result has 311 places, 469 transitions, 11984 flow [2024-06-28 04:29:02,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11712, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11984, PETRI_PLACES=311, PETRI_TRANSITIONS=469} [2024-06-28 04:29:02,223 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-28 04:29:02,223 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 469 transitions, 11984 flow [2024-06-28 04:29:02,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:02,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:02,223 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] [2024-06-28 04:29:02,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 04:29:02,223 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)] === [2024-06-28 04:29:02,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:02,224 INFO L85 PathProgramCache]: Analyzing trace with hash 770673978, now seen corresponding path program 7 times [2024-06-28 04:29:02,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:02,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485422644] [2024-06-28 04:29:02,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:02,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:04,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:04,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485422644] [2024-06-28 04:29:04,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485422644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:04,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:04,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:29:04,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806203752] [2024-06-28 04:29:04,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:04,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:29:04,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:04,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:29:04,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:29:05,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:29:05,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 469 transitions, 11984 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:05,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:05,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:29:05,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:07,245 INFO L124 PetriNetUnfolderBase]: 2906/4678 cut-off events. [2024-06-28 04:29:07,245 INFO L125 PetriNetUnfolderBase]: For 1078205/1078205 co-relation queries the response was YES. [2024-06-28 04:29:07,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75806 conditions, 4678 events. 2906/4678 cut-off events. For 1078205/1078205 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 27904 event pairs, 384 based on Foata normal form. 2/4673 useless extension candidates. Maximal degree in co-relation 75657. Up to 3555 conditions per place. [2024-06-28 04:29:07,329 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 311 selfloop transitions, 211 changer transitions 0/527 dead transitions. [2024-06-28 04:29:07,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 527 transitions, 14417 flow [2024-06-28 04:29:07,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:29:07,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:29:07,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 04:29:07,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-28 04:29:07,331 INFO L175 Difference]: Start difference. First operand has 311 places, 469 transitions, 11984 flow. Second operand 9 states and 158 transitions. [2024-06-28 04:29:07,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 527 transitions, 14417 flow [2024-06-28 04:29:09,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 527 transitions, 14253 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-28 04:29:09,099 INFO L231 Difference]: Finished difference. Result has 316 places, 499 transitions, 13414 flow [2024-06-28 04:29:09,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11820, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13414, PETRI_PLACES=316, PETRI_TRANSITIONS=499} [2024-06-28 04:29:09,100 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-28 04:29:09,100 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 499 transitions, 13414 flow [2024-06-28 04:29:09,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:09,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:09,100 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] [2024-06-28 04:29:09,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 04:29:09,100 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)] === [2024-06-28 04:29:09,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:09,101 INFO L85 PathProgramCache]: Analyzing trace with hash 778961208, now seen corresponding path program 8 times [2024-06-28 04:29:09,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:09,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362610029] [2024-06-28 04:29:09,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:09,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:11,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:11,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362610029] [2024-06-28 04:29:11,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362610029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:11,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:11,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:29:11,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19803399] [2024-06-28 04:29:11,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:11,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:29:11,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:11,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:29:11,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:29:11,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:29:11,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 499 transitions, 13414 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:11,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:11,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:29:11,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:14,281 INFO L124 PetriNetUnfolderBase]: 2975/4774 cut-off events. [2024-06-28 04:29:14,281 INFO L125 PetriNetUnfolderBase]: For 1145150/1145150 co-relation queries the response was YES. [2024-06-28 04:29:14,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79843 conditions, 4774 events. 2975/4774 cut-off events. For 1145150/1145150 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 28340 event pairs, 456 based on Foata normal form. 4/4776 useless extension candidates. Maximal degree in co-relation 79692. Up to 3764 conditions per place. [2024-06-28 04:29:14,355 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 352 selfloop transitions, 186 changer transitions 0/543 dead transitions. [2024-06-28 04:29:14,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 543 transitions, 15352 flow [2024-06-28 04:29:14,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:29:14,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:29:14,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 04:29:14,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 04:29:14,356 INFO L175 Difference]: Start difference. First operand has 316 places, 499 transitions, 13414 flow. Second operand 9 states and 153 transitions. [2024-06-28 04:29:14,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 543 transitions, 15352 flow [2024-06-28 04:29:16,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 543 transitions, 15205 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-28 04:29:16,015 INFO L231 Difference]: Finished difference. Result has 323 places, 514 transitions, 14349 flow [2024-06-28 04:29:16,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13267, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14349, PETRI_PLACES=323, PETRI_TRANSITIONS=514} [2024-06-28 04:29:16,015 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-28 04:29:16,015 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 514 transitions, 14349 flow [2024-06-28 04:29:16,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:16,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:16,016 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] [2024-06-28 04:29:16,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 04:29:16,016 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)] === [2024-06-28 04:29:16,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:16,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1038268789, now seen corresponding path program 4 times [2024-06-28 04:29:16,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:16,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206173045] [2024-06-28 04:29:16,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:16,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:19,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:19,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206173045] [2024-06-28 04:29:19,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206173045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:19,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:19,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:29:19,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948306819] [2024-06-28 04:29:19,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:19,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:29:19,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:19,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:29:19,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:29:19,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:29:19,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 514 transitions, 14349 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:19,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:19,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:29:19,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:21,303 INFO L124 PetriNetUnfolderBase]: 2985/4786 cut-off events. [2024-06-28 04:29:21,303 INFO L125 PetriNetUnfolderBase]: For 1195131/1195131 co-relation queries the response was YES. [2024-06-28 04:29:21,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82187 conditions, 4786 events. 2985/4786 cut-off events. For 1195131/1195131 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 28462 event pairs, 590 based on Foata normal form. 2/4781 useless extension candidates. Maximal degree in co-relation 82033. Up to 4422 conditions per place. [2024-06-28 04:29:21,383 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 474 selfloop transitions, 61 changer transitions 0/540 dead transitions. [2024-06-28 04:29:21,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 540 transitions, 15847 flow [2024-06-28 04:29:21,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:29:21,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:29:21,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-28 04:29:21,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3744186046511628 [2024-06-28 04:29:21,385 INFO L175 Difference]: Start difference. First operand has 323 places, 514 transitions, 14349 flow. Second operand 10 states and 161 transitions. [2024-06-28 04:29:21,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 540 transitions, 15847 flow [2024-06-28 04:29:23,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 540 transitions, 15682 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-28 04:29:23,385 INFO L231 Difference]: Finished difference. Result has 328 places, 519 transitions, 14555 flow [2024-06-28 04:29:23,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14184, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14555, PETRI_PLACES=328, PETRI_TRANSITIONS=519} [2024-06-28 04:29:23,385 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 284 predicate places. [2024-06-28 04:29:23,385 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 519 transitions, 14555 flow [2024-06-28 04:29:23,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:23,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:23,385 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] [2024-06-28 04:29:23,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 04:29:23,386 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)] === [2024-06-28 04:29:23,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:23,386 INFO L85 PathProgramCache]: Analyzing trace with hash 779244703, now seen corresponding path program 5 times [2024-06-28 04:29:23,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:23,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60844779] [2024-06-28 04:29:23,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:23,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:26,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:26,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60844779] [2024-06-28 04:29:26,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60844779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:26,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:26,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:29:26,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554337634] [2024-06-28 04:29:26,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:26,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:29:26,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:26,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:29:26,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:29:26,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:29:26,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 519 transitions, 14555 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:26,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:26,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:29:26,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:28,419 INFO L124 PetriNetUnfolderBase]: 2982/4777 cut-off events. [2024-06-28 04:29:28,420 INFO L125 PetriNetUnfolderBase]: For 1219043/1219043 co-relation queries the response was YES. [2024-06-28 04:29:28,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82682 conditions, 4777 events. 2982/4777 cut-off events. For 1219043/1219043 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 28419 event pairs, 588 based on Foata normal form. 1/4771 useless extension candidates. Maximal degree in co-relation 82528. Up to 4319 conditions per place. [2024-06-28 04:29:28,500 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 445 selfloop transitions, 106 changer transitions 0/556 dead transitions. [2024-06-28 04:29:28,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 556 transitions, 16214 flow [2024-06-28 04:29:28,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:29:28,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:29:28,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-28 04:29:28,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37906976744186044 [2024-06-28 04:29:28,501 INFO L175 Difference]: Start difference. First operand has 328 places, 519 transitions, 14555 flow. Second operand 10 states and 163 transitions. [2024-06-28 04:29:28,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 556 transitions, 16214 flow [2024-06-28 04:29:30,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 556 transitions, 15897 flow, removed 109 selfloop flow, removed 6 redundant places. [2024-06-28 04:29:30,455 INFO L231 Difference]: Finished difference. Result has 335 places, 532 transitions, 14890 flow [2024-06-28 04:29:30,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14288, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14890, PETRI_PLACES=335, PETRI_TRANSITIONS=532} [2024-06-28 04:29:30,456 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-28 04:29:30,456 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 532 transitions, 14890 flow [2024-06-28 04:29:30,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:30,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:30,456 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] [2024-06-28 04:29:30,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 04:29:30,456 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)] === [2024-06-28 04:29:30,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:30,457 INFO L85 PathProgramCache]: Analyzing trace with hash 770679558, now seen corresponding path program 9 times [2024-06-28 04:29:30,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:30,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407900428] [2024-06-28 04:29:30,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:30,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:33,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:33,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407900428] [2024-06-28 04:29:33,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407900428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:33,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:33,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:29:33,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743899068] [2024-06-28 04:29:33,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:33,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:29:33,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:33,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:29:33,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:29:33,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:29:33,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 532 transitions, 14890 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:33,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:33,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:29:33,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:35,249 INFO L124 PetriNetUnfolderBase]: 2991/4800 cut-off events. [2024-06-28 04:29:35,249 INFO L125 PetriNetUnfolderBase]: For 1243418/1243418 co-relation queries the response was YES. [2024-06-28 04:29:35,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83535 conditions, 4800 events. 2991/4800 cut-off events. For 1243418/1243418 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 28533 event pairs, 587 based on Foata normal form. 5/4798 useless extension candidates. Maximal degree in co-relation 83377. Up to 4374 conditions per place. [2024-06-28 04:29:35,326 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 453 selfloop transitions, 102 changer transitions 0/560 dead transitions. [2024-06-28 04:29:35,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 560 transitions, 16578 flow [2024-06-28 04:29:35,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:29:35,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:29:35,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-28 04:29:35,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-28 04:29:35,327 INFO L175 Difference]: Start difference. First operand has 335 places, 532 transitions, 14890 flow. Second operand 9 states and 152 transitions. [2024-06-28 04:29:35,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 560 transitions, 16578 flow [2024-06-28 04:29:37,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 560 transitions, 16336 flow, removed 105 selfloop flow, removed 3 redundant places. [2024-06-28 04:29:37,343 INFO L231 Difference]: Finished difference. Result has 341 places, 539 transitions, 15200 flow [2024-06-28 04:29:37,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14664, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15200, PETRI_PLACES=341, PETRI_TRANSITIONS=539} [2024-06-28 04:29:37,344 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 297 predicate places. [2024-06-28 04:29:37,344 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 539 transitions, 15200 flow [2024-06-28 04:29:37,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:37,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:37,344 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] [2024-06-28 04:29:37,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 04:29:37,344 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)] === [2024-06-28 04:29:37,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:37,345 INFO L85 PathProgramCache]: Analyzing trace with hash 778948188, now seen corresponding path program 10 times [2024-06-28 04:29:37,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:37,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213170714] [2024-06-28 04:29:37,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:37,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:40,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:40,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:40,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213170714] [2024-06-28 04:29:40,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213170714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:40,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:40,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:29:40,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83867979] [2024-06-28 04:29:40,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:40,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:29:40,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:40,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:29:40,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:29:40,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:29:40,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 539 transitions, 15200 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:40,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:40,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:29:40,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:43,007 INFO L124 PetriNetUnfolderBase]: 3005/4823 cut-off events. [2024-06-28 04:29:43,007 INFO L125 PetriNetUnfolderBase]: For 1269309/1269309 co-relation queries the response was YES. [2024-06-28 04:29:43,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84172 conditions, 4823 events. 3005/4823 cut-off events. For 1269309/1269309 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 28768 event pairs, 586 based on Foata normal form. 2/4818 useless extension candidates. Maximal degree in co-relation 84011. Up to 4354 conditions per place. [2024-06-28 04:29:43,083 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 451 selfloop transitions, 122 changer transitions 0/578 dead transitions. [2024-06-28 04:29:43,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 578 transitions, 17010 flow [2024-06-28 04:29:43,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:29:43,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:29:43,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-28 04:29:43,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-28 04:29:43,084 INFO L175 Difference]: Start difference. First operand has 341 places, 539 transitions, 15200 flow. Second operand 9 states and 148 transitions. [2024-06-28 04:29:43,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 578 transitions, 17010 flow [2024-06-28 04:29:45,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 578 transitions, 16657 flow, removed 110 selfloop flow, removed 5 redundant places. [2024-06-28 04:29:45,065 INFO L231 Difference]: Finished difference. Result has 347 places, 561 transitions, 15843 flow [2024-06-28 04:29:45,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14847, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15843, PETRI_PLACES=347, PETRI_TRANSITIONS=561} [2024-06-28 04:29:45,065 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-28 04:29:45,065 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 561 transitions, 15843 flow [2024-06-28 04:29:45,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:45,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:45,066 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] [2024-06-28 04:29:45,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 04:29:45,066 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)] === [2024-06-28 04:29:45,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:45,066 INFO L85 PathProgramCache]: Analyzing trace with hash 347923517, now seen corresponding path program 1 times [2024-06-28 04:29:45,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:45,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699285670] [2024-06-28 04:29:45,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:45,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:45,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:48,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:48,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699285670] [2024-06-28 04:29:48,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699285670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:48,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:48,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:29:48,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359313152] [2024-06-28 04:29:48,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:48,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:29:48,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:48,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:29:48,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:29:48,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:29:48,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 561 transitions, 15843 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:48,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:48,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:29:48,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:51,047 INFO L124 PetriNetUnfolderBase]: 3059/4957 cut-off events. [2024-06-28 04:29:51,047 INFO L125 PetriNetUnfolderBase]: For 1407338/1407338 co-relation queries the response was YES. [2024-06-28 04:29:51,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87532 conditions, 4957 events. 3059/4957 cut-off events. For 1407338/1407338 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 30284 event pairs, 942 based on Foata normal form. 62/5017 useless extension candidates. Maximal degree in co-relation 87367. Up to 4407 conditions per place. [2024-06-28 04:29:51,132 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 553 selfloop transitions, 41 changer transitions 0/599 dead transitions. [2024-06-28 04:29:51,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 599 transitions, 17868 flow [2024-06-28 04:29:51,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:29:51,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:29:51,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-28 04:29:51,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3627906976744186 [2024-06-28 04:29:51,133 INFO L175 Difference]: Start difference. First operand has 347 places, 561 transitions, 15843 flow. Second operand 10 states and 156 transitions. [2024-06-28 04:29:51,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 599 transitions, 17868 flow [2024-06-28 04:29:53,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 599 transitions, 17554 flow, removed 131 selfloop flow, removed 4 redundant places. [2024-06-28 04:29:53,772 INFO L231 Difference]: Finished difference. Result has 355 places, 568 transitions, 15893 flow [2024-06-28 04:29:53,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15422, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15893, PETRI_PLACES=355, PETRI_TRANSITIONS=568} [2024-06-28 04:29:53,772 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-28 04:29:53,772 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 568 transitions, 15893 flow [2024-06-28 04:29:53,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:53,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:53,773 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] [2024-06-28 04:29:53,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 04:29:53,773 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)] === [2024-06-28 04:29:53,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:53,773 INFO L85 PathProgramCache]: Analyzing trace with hash 2093494649, now seen corresponding path program 2 times [2024-06-28 04:29:53,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:53,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868879662] [2024-06-28 04:29:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:53,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:56,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:56,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868879662] [2024-06-28 04:29:56,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868879662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:56,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:56,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:29:56,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29511768] [2024-06-28 04:29:56,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:56,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:29:56,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:56,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:29:56,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:29:56,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:29:56,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 568 transitions, 15893 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:56,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:56,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:29:56,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:58,982 INFO L124 PetriNetUnfolderBase]: 3060/4960 cut-off events. [2024-06-28 04:29:58,982 INFO L125 PetriNetUnfolderBase]: For 1400802/1400802 co-relation queries the response was YES. [2024-06-28 04:29:59,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87931 conditions, 4960 events. 3060/4960 cut-off events. For 1400802/1400802 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30376 event pairs, 942 based on Foata normal form. 2/4960 useless extension candidates. Maximal degree in co-relation 87762. Up to 4642 conditions per place. [2024-06-28 04:29:59,069 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 543 selfloop transitions, 44 changer transitions 0/592 dead transitions. [2024-06-28 04:29:59,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 592 transitions, 17769 flow [2024-06-28 04:29:59,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:29:59,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:29:59,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-28 04:29:59,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36175710594315247 [2024-06-28 04:29:59,071 INFO L175 Difference]: Start difference. First operand has 355 places, 568 transitions, 15893 flow. Second operand 9 states and 140 transitions. [2024-06-28 04:29:59,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 592 transitions, 17769 flow [2024-06-28 04:30:01,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 592 transitions, 17526 flow, removed 104 selfloop flow, removed 4 redundant places. [2024-06-28 04:30:01,347 INFO L231 Difference]: Finished difference. Result has 361 places, 572 transitions, 16028 flow [2024-06-28 04:30:01,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15655, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16028, PETRI_PLACES=361, PETRI_TRANSITIONS=572} [2024-06-28 04:30:01,347 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-28 04:30:01,347 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 572 transitions, 16028 flow [2024-06-28 04:30:01,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:01,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:01,348 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] [2024-06-28 04:30:01,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 04:30:01,348 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)] === [2024-06-28 04:30:01,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:01,348 INFO L85 PathProgramCache]: Analyzing trace with hash -763385833, now seen corresponding path program 3 times [2024-06-28 04:30:01,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:01,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802418948] [2024-06-28 04:30:01,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:01,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:04,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:04,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802418948] [2024-06-28 04:30:04,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802418948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:04,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:04,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:30:04,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432811501] [2024-06-28 04:30:04,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:04,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:30:04,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:04,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:30:04,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:30:04,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:30:04,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 572 transitions, 16028 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:04,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:04,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:30:04,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:06,626 INFO L124 PetriNetUnfolderBase]: 3054/4938 cut-off events. [2024-06-28 04:30:06,626 INFO L125 PetriNetUnfolderBase]: For 1393330/1393330 co-relation queries the response was YES. [2024-06-28 04:30:06,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87524 conditions, 4938 events. 3054/4938 cut-off events. For 1393330/1393330 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30019 event pairs, 610 based on Foata normal form. 3/4930 useless extension candidates. Maximal degree in co-relation 87354. Up to 4559 conditions per place. [2024-06-28 04:30:06,718 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 528 selfloop transitions, 56 changer transitions 0/589 dead transitions. [2024-06-28 04:30:06,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 589 transitions, 17475 flow [2024-06-28 04:30:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:06,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:06,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 04:30:06,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-28 04:30:06,719 INFO L175 Difference]: Start difference. First operand has 361 places, 572 transitions, 16028 flow. Second operand 8 states and 132 transitions. [2024-06-28 04:30:06,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 589 transitions, 17475 flow [2024-06-28 04:30:09,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 589 transitions, 17331 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-28 04:30:09,318 INFO L231 Difference]: Finished difference. Result has 362 places, 572 transitions, 16007 flow [2024-06-28 04:30:09,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15884, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16007, PETRI_PLACES=362, PETRI_TRANSITIONS=572} [2024-06-28 04:30:09,318 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-28 04:30:09,318 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 572 transitions, 16007 flow [2024-06-28 04:30:09,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:09,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:09,319 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] [2024-06-28 04:30:09,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 04:30:09,319 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)] === [2024-06-28 04:30:09,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:09,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1047004496, now seen corresponding path program 1 times [2024-06-28 04:30:09,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:09,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054464922] [2024-06-28 04:30:09,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:09,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:12,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:12,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054464922] [2024-06-28 04:30:12,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054464922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:12,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:12,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:30:12,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453287928] [2024-06-28 04:30:12,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:12,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:30:12,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:12,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:30:12,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:30:12,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:30:12,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 572 transitions, 16007 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:12,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:12,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:30:12,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:15,430 INFO L124 PetriNetUnfolderBase]: 3067/4973 cut-off events. [2024-06-28 04:30:15,430 INFO L125 PetriNetUnfolderBase]: For 1404305/1404305 co-relation queries the response was YES. [2024-06-28 04:30:15,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87828 conditions, 4973 events. 3067/4973 cut-off events. For 1404305/1404305 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30503 event pairs, 659 based on Foata normal form. 2/4973 useless extension candidates. Maximal degree in co-relation 87658. Up to 4012 conditions per place. [2024-06-28 04:30:15,521 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 410 selfloop transitions, 189 changer transitions 0/604 dead transitions. [2024-06-28 04:30:15,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 604 transitions, 17631 flow [2024-06-28 04:30:15,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:30:15,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:30:15,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 04:30:15,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-28 04:30:15,522 INFO L175 Difference]: Start difference. First operand has 362 places, 572 transitions, 16007 flow. Second operand 9 states and 151 transitions. [2024-06-28 04:30:15,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 604 transitions, 17631 flow [2024-06-28 04:30:18,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 604 transitions, 17446 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-28 04:30:18,061 INFO L231 Difference]: Finished difference. Result has 365 places, 578 transitions, 16561 flow [2024-06-28 04:30:18,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15822, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16561, PETRI_PLACES=365, PETRI_TRANSITIONS=578} [2024-06-28 04:30:18,061 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-28 04:30:18,062 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 578 transitions, 16561 flow [2024-06-28 04:30:18,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:18,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:18,062 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] [2024-06-28 04:30:18,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 04:30:18,062 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)] === [2024-06-28 04:30:18,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:18,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1052576126, now seen corresponding path program 2 times [2024-06-28 04:30:18,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:18,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897407233] [2024-06-28 04:30:18,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:18,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:22,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:22,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:22,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897407233] [2024-06-28 04:30:22,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897407233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:22,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:22,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:30:22,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662067512] [2024-06-28 04:30:22,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:22,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:30:22,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:22,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:30:22,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:30:22,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:30:22,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 578 transitions, 16561 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:22,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:22,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:30:22,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:25,117 INFO L124 PetriNetUnfolderBase]: 3075/4992 cut-off events. [2024-06-28 04:30:25,117 INFO L125 PetriNetUnfolderBase]: For 1446388/1446388 co-relation queries the response was YES. [2024-06-28 04:30:25,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89398 conditions, 4992 events. 3075/4992 cut-off events. For 1446388/1446388 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 30696 event pairs, 946 based on Foata normal form. 2/4992 useless extension candidates. Maximal degree in co-relation 89227. Up to 4647 conditions per place. [2024-06-28 04:30:25,211 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 561 selfloop transitions, 43 changer transitions 0/609 dead transitions. [2024-06-28 04:30:25,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 609 transitions, 18163 flow [2024-06-28 04:30:25,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:30:25,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:30:25,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-28 04:30:25,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3674418604651163 [2024-06-28 04:30:25,212 INFO L175 Difference]: Start difference. First operand has 365 places, 578 transitions, 16561 flow. Second operand 10 states and 158 transitions. [2024-06-28 04:30:25,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 609 transitions, 18163 flow [2024-06-28 04:30:27,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 609 transitions, 18103 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-28 04:30:27,999 INFO L231 Difference]: Finished difference. Result has 372 places, 582 transitions, 16758 flow [2024-06-28 04:30:27,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16501, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16758, PETRI_PLACES=372, PETRI_TRANSITIONS=582} [2024-06-28 04:30:27,999 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-28 04:30:27,999 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 582 transitions, 16758 flow [2024-06-28 04:30:27,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:27,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:27,999 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] [2024-06-28 04:30:27,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 04:30:28,000 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)] === [2024-06-28 04:30:28,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:28,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1052366876, now seen corresponding path program 3 times [2024-06-28 04:30:28,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:28,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322941342] [2024-06-28 04:30:28,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:28,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:31,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:31,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322941342] [2024-06-28 04:30:31,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322941342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:31,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:31,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 04:30:31,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91104176] [2024-06-28 04:30:31,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:31,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 04:30:31,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:31,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 04:30:31,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-28 04:30:31,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:30:31,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 582 transitions, 16758 flow. Second operand has 12 states, 12 states have (on average 9.583333333333334) internal successors, (115), 12 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:31,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:31,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:30:31,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:33,955 INFO L124 PetriNetUnfolderBase]: 3070/4974 cut-off events. [2024-06-28 04:30:33,955 INFO L125 PetriNetUnfolderBase]: For 1459147/1459147 co-relation queries the response was YES. [2024-06-28 04:30:34,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89712 conditions, 4974 events. 3070/4974 cut-off events. For 1459147/1459147 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30388 event pairs, 749 based on Foata normal form. 2/4974 useless extension candidates. Maximal degree in co-relation 89538. Up to 4044 conditions per place. [2024-06-28 04:30:34,048 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 429 selfloop transitions, 175 changer transitions 0/609 dead transitions. [2024-06-28 04:30:34,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 609 transitions, 18229 flow [2024-06-28 04:30:34,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:30:34,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:30:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-28 04:30:34,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767441860465116 [2024-06-28 04:30:34,050 INFO L175 Difference]: Start difference. First operand has 372 places, 582 transitions, 16758 flow. Second operand 10 states and 162 transitions. [2024-06-28 04:30:34,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 609 transitions, 18229 flow [2024-06-28 04:30:36,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 609 transitions, 18152 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 04:30:36,640 INFO L231 Difference]: Finished difference. Result has 376 places, 582 transitions, 17036 flow [2024-06-28 04:30:36,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16681, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17036, PETRI_PLACES=376, PETRI_TRANSITIONS=582} [2024-06-28 04:30:36,640 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 332 predicate places. [2024-06-28 04:30:36,640 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 582 transitions, 17036 flow [2024-06-28 04:30:36,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.583333333333334) internal successors, (115), 12 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:36,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:36,641 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] [2024-06-28 04:30:36,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 04:30:36,641 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)] === [2024-06-28 04:30:36,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:36,641 INFO L85 PathProgramCache]: Analyzing trace with hash 784973720, now seen corresponding path program 4 times [2024-06-28 04:30:36,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:36,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570085672] [2024-06-28 04:30:36,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:36,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:40,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:40,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570085672] [2024-06-28 04:30:40,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570085672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:40,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:40,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:30:40,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357685798] [2024-06-28 04:30:40,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:40,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:30:40,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:40,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:30:40,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:30:40,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:30:40,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 582 transitions, 17036 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:40,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:40,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:30:40,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:42,641 INFO L124 PetriNetUnfolderBase]: 3065/4968 cut-off events. [2024-06-28 04:30:42,641 INFO L125 PetriNetUnfolderBase]: For 1502142/1502142 co-relation queries the response was YES. [2024-06-28 04:30:42,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90497 conditions, 4968 events. 3065/4968 cut-off events. For 1502142/1502142 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30357 event pairs, 934 based on Foata normal form. 2/4968 useless extension candidates. Maximal degree in co-relation 90322. Up to 4701 conditions per place. [2024-06-28 04:30:42,728 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 569 selfloop transitions, 28 changer transitions 0/602 dead transitions. [2024-06-28 04:30:42,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 602 transitions, 18329 flow [2024-06-28 04:30:42,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:30:42,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:30:42,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-28 04:30:42,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35400516795865633 [2024-06-28 04:30:42,729 INFO L175 Difference]: Start difference. First operand has 376 places, 582 transitions, 17036 flow. Second operand 9 states and 137 transitions. [2024-06-28 04:30:42,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 602 transitions, 18329 flow [2024-06-28 04:30:45,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 602 transitions, 18109 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-28 04:30:45,160 INFO L231 Difference]: Finished difference. Result has 379 places, 584 transitions, 16933 flow [2024-06-28 04:30:45,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16816, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16933, PETRI_PLACES=379, PETRI_TRANSITIONS=584} [2024-06-28 04:30:45,161 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-28 04:30:45,161 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 584 transitions, 16933 flow [2024-06-28 04:30:45,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:45,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:45,161 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] [2024-06-28 04:30:45,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 04:30:45,161 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)] === [2024-06-28 04:30:45,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:45,161 INFO L85 PathProgramCache]: Analyzing trace with hash 970407619, now seen corresponding path program 1 times [2024-06-28 04:30:45,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:45,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559057007] [2024-06-28 04:30:45,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:45,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:48,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:48,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:48,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559057007] [2024-06-28 04:30:48,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559057007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:48,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:48,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:30:48,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601581133] [2024-06-28 04:30:48,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:48,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:30:48,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:48,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:30:48,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:30:48,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:30:48,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 584 transitions, 16933 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:48,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:48,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:30:48,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:50,768 INFO L124 PetriNetUnfolderBase]: 3300/5343 cut-off events. [2024-06-28 04:30:50,769 INFO L125 PetriNetUnfolderBase]: For 1631496/1631496 co-relation queries the response was YES. [2024-06-28 04:30:50,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95938 conditions, 5343 events. 3300/5343 cut-off events. For 1631496/1631496 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 32747 event pairs, 599 based on Foata normal form. 8/5349 useless extension candidates. Maximal degree in co-relation 95762. Up to 4732 conditions per place. [2024-06-28 04:30:50,866 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 590 selfloop transitions, 81 changer transitions 0/676 dead transitions. [2024-06-28 04:30:50,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 676 transitions, 20170 flow [2024-06-28 04:30:50,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:30:50,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:30:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-28 04:30:50,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-28 04:30:50,868 INFO L175 Difference]: Start difference. First operand has 379 places, 584 transitions, 16933 flow. Second operand 10 states and 192 transitions. [2024-06-28 04:30:50,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 676 transitions, 20170 flow [2024-06-28 04:30:54,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 676 transitions, 20079 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-28 04:30:54,028 INFO L231 Difference]: Finished difference. Result has 385 places, 617 transitions, 18336 flow [2024-06-28 04:30:54,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16844, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18336, PETRI_PLACES=385, PETRI_TRANSITIONS=617} [2024-06-28 04:30:54,029 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-28 04:30:54,029 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 617 transitions, 18336 flow [2024-06-28 04:30:54,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:54,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:54,030 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] [2024-06-28 04:30:54,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 04:30:54,030 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)] === [2024-06-28 04:30:54,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:54,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1490654163, now seen corresponding path program 2 times [2024-06-28 04:30:54,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:54,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023633332] [2024-06-28 04:30:54,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:54,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:56,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:56,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023633332] [2024-06-28 04:30:56,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023633332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:56,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:56,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:30:56,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140877952] [2024-06-28 04:30:56,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:56,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:30:56,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:56,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:30:56,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:30:56,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:30:56,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 617 transitions, 18336 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:56,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:56,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:30:56,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:59,614 INFO L124 PetriNetUnfolderBase]: 3374/5455 cut-off events. [2024-06-28 04:30:59,614 INFO L125 PetriNetUnfolderBase]: For 1664471/1664471 co-relation queries the response was YES. [2024-06-28 04:30:59,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98391 conditions, 5455 events. 3374/5455 cut-off events. For 1664471/1664471 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 33508 event pairs, 637 based on Foata normal form. 8/5461 useless extension candidates. Maximal degree in co-relation 98211. Up to 4954 conditions per place. [2024-06-28 04:30:59,721 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 590 selfloop transitions, 80 changer transitions 0/675 dead transitions. [2024-06-28 04:30:59,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 675 transitions, 20462 flow [2024-06-28 04:30:59,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:30:59,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:30:59,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-28 04:30:59,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-28 04:30:59,722 INFO L175 Difference]: Start difference. First operand has 385 places, 617 transitions, 18336 flow. Second operand 10 states and 186 transitions. [2024-06-28 04:30:59,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 675 transitions, 20462 flow [2024-06-28 04:31:02,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 675 transitions, 20357 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-28 04:31:02,747 INFO L231 Difference]: Finished difference. Result has 394 places, 625 transitions, 18716 flow [2024-06-28 04:31:02,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18241, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18716, PETRI_PLACES=394, PETRI_TRANSITIONS=625} [2024-06-28 04:31:02,747 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 350 predicate places. [2024-06-28 04:31:02,747 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 625 transitions, 18716 flow [2024-06-28 04:31:02,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:02,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:02,748 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] [2024-06-28 04:31:02,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 04:31:02,748 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)] === [2024-06-28 04:31:02,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:02,748 INFO L85 PathProgramCache]: Analyzing trace with hash 435711697, now seen corresponding path program 1 times [2024-06-28 04:31:02,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:02,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648640266] [2024-06-28 04:31:02,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:02,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:05,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:05,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648640266] [2024-06-28 04:31:05,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648640266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:05,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:05,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:05,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435291852] [2024-06-28 04:31:05,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:05,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:05,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:05,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:05,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:05,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:31:05,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 625 transitions, 18716 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:05,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:05,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:31:05,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:08,410 INFO L124 PetriNetUnfolderBase]: 3408/5509 cut-off events. [2024-06-28 04:31:08,410 INFO L125 PetriNetUnfolderBase]: For 1683017/1683017 co-relation queries the response was YES. [2024-06-28 04:31:08,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99767 conditions, 5509 events. 3408/5509 cut-off events. For 1683017/1683017 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 33854 event pairs, 641 based on Foata normal form. 2/5509 useless extension candidates. Maximal degree in co-relation 99584. Up to 5088 conditions per place. [2024-06-28 04:31:08,506 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 608 selfloop transitions, 76 changer transitions 0/689 dead transitions. [2024-06-28 04:31:08,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 689 transitions, 21088 flow [2024-06-28 04:31:08,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:31:08,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:31:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-28 04:31:08,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-28 04:31:08,508 INFO L175 Difference]: Start difference. First operand has 394 places, 625 transitions, 18716 flow. Second operand 10 states and 182 transitions. [2024-06-28 04:31:08,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 689 transitions, 21088 flow [2024-06-28 04:31:11,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 689 transitions, 20936 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 04:31:11,589 INFO L231 Difference]: Finished difference. Result has 402 places, 643 transitions, 19443 flow [2024-06-28 04:31:11,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18565, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19443, PETRI_PLACES=402, PETRI_TRANSITIONS=643} [2024-06-28 04:31:11,589 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 358 predicate places. [2024-06-28 04:31:11,589 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 643 transitions, 19443 flow [2024-06-28 04:31:11,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:11,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:11,589 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] [2024-06-28 04:31:11,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 04:31:11,590 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)] === [2024-06-28 04:31:11,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:11,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1977432797, now seen corresponding path program 1 times [2024-06-28 04:31:11,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:11,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237569245] [2024-06-28 04:31:11,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:11,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:14,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:14,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237569245] [2024-06-28 04:31:14,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237569245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:14,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:14,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:14,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391852719] [2024-06-28 04:31:14,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:14,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:14,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:14,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:14,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:14,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:31:14,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 643 transitions, 19443 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:14,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:14,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:31:14,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:17,682 INFO L124 PetriNetUnfolderBase]: 3476/5658 cut-off events. [2024-06-28 04:31:17,683 INFO L125 PetriNetUnfolderBase]: For 1730475/1730475 co-relation queries the response was YES. [2024-06-28 04:31:17,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102237 conditions, 5658 events. 3476/5658 cut-off events. For 1730475/1730475 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 35148 event pairs, 691 based on Foata normal form. 1/5656 useless extension candidates. Maximal degree in co-relation 102050. Up to 5216 conditions per place. [2024-06-28 04:31:17,786 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 663 selfloop transitions, 49 changer transitions 0/717 dead transitions. [2024-06-28 04:31:17,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 717 transitions, 21968 flow [2024-06-28 04:31:17,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:31:17,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:31:17,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2024-06-28 04:31:17,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992248062015504 [2024-06-28 04:31:17,787 INFO L175 Difference]: Start difference. First operand has 402 places, 643 transitions, 19443 flow. Second operand 12 states and 206 transitions. [2024-06-28 04:31:17,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 717 transitions, 21968 flow [2024-06-28 04:31:21,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 717 transitions, 21702 flow, removed 99 selfloop flow, removed 3 redundant places. [2024-06-28 04:31:21,120 INFO L231 Difference]: Finished difference. Result has 414 places, 665 transitions, 20116 flow [2024-06-28 04:31:21,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19177, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=20116, PETRI_PLACES=414, PETRI_TRANSITIONS=665} [2024-06-28 04:31:21,121 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 370 predicate places. [2024-06-28 04:31:21,121 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 665 transitions, 20116 flow [2024-06-28 04:31:21,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:21,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:21,121 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] [2024-06-28 04:31:21,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 04:31:21,121 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)] === [2024-06-28 04:31:21,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:21,121 INFO L85 PathProgramCache]: Analyzing trace with hash 34257875, now seen corresponding path program 3 times [2024-06-28 04:31:21,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:21,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52793427] [2024-06-28 04:31:21,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:21,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:24,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:24,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:24,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52793427] [2024-06-28 04:31:24,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52793427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:24,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:24,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:24,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755633655] [2024-06-28 04:31:24,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:24,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:24,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:24,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:24,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:24,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:31:24,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 665 transitions, 20116 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:24,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:24,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:31:24,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:27,212 INFO L124 PetriNetUnfolderBase]: 3458/5613 cut-off events. [2024-06-28 04:31:27,212 INFO L125 PetriNetUnfolderBase]: For 1747927/1747927 co-relation queries the response was YES. [2024-06-28 04:31:27,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101524 conditions, 5613 events. 3458/5613 cut-off events. For 1747927/1747927 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 34722 event pairs, 628 based on Foata normal form. 8/5618 useless extension candidates. Maximal degree in co-relation 101333. Up to 5097 conditions per place. [2024-06-28 04:31:27,314 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 620 selfloop transitions, 82 changer transitions 0/707 dead transitions. [2024-06-28 04:31:27,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 707 transitions, 21962 flow [2024-06-28 04:31:27,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:31:27,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:31:27,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-28 04:31:27,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116279069767442 [2024-06-28 04:31:27,315 INFO L175 Difference]: Start difference. First operand has 414 places, 665 transitions, 20116 flow. Second operand 10 states and 177 transitions. [2024-06-28 04:31:27,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 707 transitions, 21962 flow [2024-06-28 04:31:30,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 707 transitions, 21843 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-28 04:31:30,856 INFO L231 Difference]: Finished difference. Result has 423 places, 667 transitions, 20206 flow [2024-06-28 04:31:30,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19997, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20206, PETRI_PLACES=423, PETRI_TRANSITIONS=667} [2024-06-28 04:31:30,857 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-28 04:31:30,857 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 667 transitions, 20206 flow [2024-06-28 04:31:30,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:30,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:30,857 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, 1, 1] [2024-06-28 04:31:30,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 04:31:30,858 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)] === [2024-06-28 04:31:30,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:30,858 INFO L85 PathProgramCache]: Analyzing trace with hash -928285513, now seen corresponding path program 2 times [2024-06-28 04:31:30,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:30,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661961733] [2024-06-28 04:31:30,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:30,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:33,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:33,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661961733] [2024-06-28 04:31:33,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661961733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:33,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:33,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:33,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611417143] [2024-06-28 04:31:33,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:33,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:33,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:33,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:33,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:33,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:31:33,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 667 transitions, 20206 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:33,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:33,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:31:33,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:36,672 INFO L124 PetriNetUnfolderBase]: 3519/5714 cut-off events. [2024-06-28 04:31:36,672 INFO L125 PetriNetUnfolderBase]: For 1787959/1787959 co-relation queries the response was YES. [2024-06-28 04:31:36,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103807 conditions, 5714 events. 3519/5714 cut-off events. For 1787959/1787959 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 35527 event pairs, 689 based on Foata normal form. 2/5714 useless extension candidates. Maximal degree in co-relation 103612. Up to 5357 conditions per place. [2024-06-28 04:31:36,787 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 679 selfloop transitions, 37 changer transitions 0/721 dead transitions. [2024-06-28 04:31:36,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 721 transitions, 22763 flow [2024-06-28 04:31:36,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:31:36,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:31:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-28 04:31:36,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3883720930232558 [2024-06-28 04:31:36,789 INFO L175 Difference]: Start difference. First operand has 423 places, 667 transitions, 20206 flow. Second operand 10 states and 167 transitions. [2024-06-28 04:31:36,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 721 transitions, 22763 flow [2024-06-28 04:31:40,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 721 transitions, 22649 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 04:31:40,517 INFO L231 Difference]: Finished difference. Result has 431 places, 686 transitions, 21001 flow [2024-06-28 04:31:40,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=20092, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=21001, PETRI_PLACES=431, PETRI_TRANSITIONS=686} [2024-06-28 04:31:40,517 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 387 predicate places. [2024-06-28 04:31:40,517 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 686 transitions, 21001 flow [2024-06-28 04:31:40,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:40,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:40,518 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] [2024-06-28 04:31:40,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 04:31:40,518 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)] === [2024-06-28 04:31:40,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:40,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1757260665, now seen corresponding path program 2 times [2024-06-28 04:31:40,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:40,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078159617] [2024-06-28 04:31:40,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:40,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:43,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:43,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078159617] [2024-06-28 04:31:43,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078159617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:43,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:43,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:43,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798856006] [2024-06-28 04:31:43,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:43,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:43,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:43,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:43,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:43,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:31:43,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 686 transitions, 21001 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:43,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:43,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:31:43,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:46,597 INFO L124 PetriNetUnfolderBase]: 3568/5790 cut-off events. [2024-06-28 04:31:46,598 INFO L125 PetriNetUnfolderBase]: For 1834706/1834706 co-relation queries the response was YES. [2024-06-28 04:31:46,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105801 conditions, 5790 events. 3568/5790 cut-off events. For 1834706/1834706 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 36019 event pairs, 703 based on Foata normal form. 1/5789 useless extension candidates. Maximal degree in co-relation 105603. Up to 5417 conditions per place. [2024-06-28 04:31:46,722 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 694 selfloop transitions, 40 changer transitions 0/739 dead transitions. [2024-06-28 04:31:46,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 739 transitions, 23453 flow [2024-06-28 04:31:46,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:31:46,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:31:46,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-28 04:31:46,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-28 04:31:46,724 INFO L175 Difference]: Start difference. First operand has 431 places, 686 transitions, 21001 flow. Second operand 10 states and 173 transitions. [2024-06-28 04:31:46,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 739 transitions, 23453 flow [2024-06-28 04:31:50,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 739 transitions, 23212 flow, removed 111 selfloop flow, removed 4 redundant places. [2024-06-28 04:31:50,768 INFO L231 Difference]: Finished difference. Result has 439 places, 702 transitions, 21545 flow [2024-06-28 04:31:50,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=20760, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=21545, PETRI_PLACES=439, PETRI_TRANSITIONS=702} [2024-06-28 04:31:50,769 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-28 04:31:50,769 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 702 transitions, 21545 flow [2024-06-28 04:31:50,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:50,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:50,769 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] [2024-06-28 04:31:50,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 04:31:50,769 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)] === [2024-06-28 04:31:50,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:50,770 INFO L85 PathProgramCache]: Analyzing trace with hash -35222371, now seen corresponding path program 3 times [2024-06-28 04:31:50,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:50,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901289588] [2024-06-28 04:31:50,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:50,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:53,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:53,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901289588] [2024-06-28 04:31:53,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901289588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:53,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:53,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:53,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393490139] [2024-06-28 04:31:53,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:53,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:53,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:53,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:53,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:53,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:31:53,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 702 transitions, 21545 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:53,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:53,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:31:53,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:57,188 INFO L124 PetriNetUnfolderBase]: 3562/5782 cut-off events. [2024-06-28 04:31:57,188 INFO L125 PetriNetUnfolderBase]: For 1851342/1851342 co-relation queries the response was YES. [2024-06-28 04:31:57,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105806 conditions, 5782 events. 3562/5782 cut-off events. For 1851342/1851342 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 35998 event pairs, 702 based on Foata normal form. 2/5782 useless extension candidates. Maximal degree in co-relation 105604. Up to 5430 conditions per place. [2024-06-28 04:31:57,300 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 693 selfloop transitions, 37 changer transitions 0/735 dead transitions. [2024-06-28 04:31:57,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 735 transitions, 23148 flow [2024-06-28 04:31:57,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:31:57,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:31:57,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-28 04:31:57,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-06-28 04:31:57,301 INFO L175 Difference]: Start difference. First operand has 439 places, 702 transitions, 21545 flow. Second operand 10 states and 168 transitions. [2024-06-28 04:31:57,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 735 transitions, 23148 flow [2024-06-28 04:32:00,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 735 transitions, 22924 flow, removed 91 selfloop flow, removed 5 redundant places. [2024-06-28 04:32:00,913 INFO L231 Difference]: Finished difference. Result has 444 places, 702 transitions, 21401 flow [2024-06-28 04:32:00,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=21321, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=21401, PETRI_PLACES=444, PETRI_TRANSITIONS=702} [2024-06-28 04:32:00,913 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 400 predicate places. [2024-06-28 04:32:00,913 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 702 transitions, 21401 flow [2024-06-28 04:32:00,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:00,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:00,914 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] [2024-06-28 04:32:00,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 04:32:00,914 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)] === [2024-06-28 04:32:00,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:00,914 INFO L85 PathProgramCache]: Analyzing trace with hash -752809137, now seen corresponding path program 4 times [2024-06-28 04:32:00,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:00,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832611769] [2024-06-28 04:32:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:00,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:03,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:03,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832611769] [2024-06-28 04:32:03,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832611769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:03,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:03,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:32:03,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353392781] [2024-06-28 04:32:03,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:03,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:32:03,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:03,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:32:03,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:32:03,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:32:03,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 702 transitions, 21401 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:03,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:03,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:32:03,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:07,346 INFO L124 PetriNetUnfolderBase]: 3870/6259 cut-off events. [2024-06-28 04:32:07,346 INFO L125 PetriNetUnfolderBase]: For 2040538/2040538 co-relation queries the response was YES. [2024-06-28 04:32:07,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113414 conditions, 6259 events. 3870/6259 cut-off events. For 2040538/2040538 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 39239 event pairs, 718 based on Foata normal form. 8/6265 useless extension candidates. Maximal degree in co-relation 113211. Up to 5482 conditions per place. [2024-06-28 04:32:07,486 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 675 selfloop transitions, 118 changer transitions 0/798 dead transitions. [2024-06-28 04:32:07,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 798 transitions, 25293 flow [2024-06-28 04:32:07,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:32:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:32:07,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-28 04:32:07,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-28 04:32:07,487 INFO L175 Difference]: Start difference. First operand has 444 places, 702 transitions, 21401 flow. Second operand 10 states and 192 transitions. [2024-06-28 04:32:07,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 798 transitions, 25293 flow [2024-06-28 04:32:11,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 798 transitions, 25220 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 04:32:11,352 INFO L231 Difference]: Finished difference. Result has 451 places, 740 transitions, 23383 flow [2024-06-28 04:32:11,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=21328, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=23383, PETRI_PLACES=451, PETRI_TRANSITIONS=740} [2024-06-28 04:32:11,353 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-28 04:32:11,353 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 740 transitions, 23383 flow [2024-06-28 04:32:11,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:11,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:11,353 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] [2024-06-28 04:32:11,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 04:32:11,353 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)] === [2024-06-28 04:32:11,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:11,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1718309751, now seen corresponding path program 5 times [2024-06-28 04:32:11,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:11,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713355472] [2024-06-28 04:32:11,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:11,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:14,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:14,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:14,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713355472] [2024-06-28 04:32:14,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713355472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:14,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:14,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:32:14,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872619644] [2024-06-28 04:32:14,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:14,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:32:14,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:14,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:32:14,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:32:14,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:32:14,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 740 transitions, 23383 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:14,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:14,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:32:14,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:18,095 INFO L124 PetriNetUnfolderBase]: 3852/6235 cut-off events. [2024-06-28 04:32:18,095 INFO L125 PetriNetUnfolderBase]: For 2045268/2045268 co-relation queries the response was YES. [2024-06-28 04:32:18,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113561 conditions, 6235 events. 3852/6235 cut-off events. For 2045268/2045268 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 39201 event pairs, 735 based on Foata normal form. 8/6241 useless extension candidates. Maximal degree in co-relation 113353. Up to 5612 conditions per place. [2024-06-28 04:32:18,310 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 675 selfloop transitions, 110 changer transitions 0/790 dead transitions. [2024-06-28 04:32:18,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 790 transitions, 25398 flow [2024-06-28 04:32:18,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:32:18,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:32:18,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-28 04:32:18,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-28 04:32:18,311 INFO L175 Difference]: Start difference. First operand has 451 places, 740 transitions, 23383 flow. Second operand 10 states and 183 transitions. [2024-06-28 04:32:18,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 790 transitions, 25398 flow [2024-06-28 04:32:22,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 790 transitions, 25275 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-28 04:32:22,552 INFO L231 Difference]: Finished difference. Result has 459 places, 743 transitions, 23551 flow [2024-06-28 04:32:22,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=23260, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=23551, PETRI_PLACES=459, PETRI_TRANSITIONS=743} [2024-06-28 04:32:22,553 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 415 predicate places. [2024-06-28 04:32:22,553 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 743 transitions, 23551 flow [2024-06-28 04:32:22,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:22,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:22,553 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] [2024-06-28 04:32:22,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 04:32:22,553 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)] === [2024-06-28 04:32:22,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:22,554 INFO L85 PathProgramCache]: Analyzing trace with hash 109798637, now seen corresponding path program 6 times [2024-06-28 04:32:22,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:22,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495268680] [2024-06-28 04:32:22,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:22,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:24,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:24,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495268680] [2024-06-28 04:32:24,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495268680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:24,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:24,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:32:24,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155754264] [2024-06-28 04:32:24,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:24,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:32:24,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:24,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:32:24,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:32:25,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:32:25,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 743 transitions, 23551 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:25,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:25,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:32:25,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:28,768 INFO L124 PetriNetUnfolderBase]: 4020/6501 cut-off events. [2024-06-28 04:32:28,768 INFO L125 PetriNetUnfolderBase]: For 2140571/2140571 co-relation queries the response was YES. [2024-06-28 04:32:28,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117741 conditions, 6501 events. 4020/6501 cut-off events. For 2140571/2140571 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 41014 event pairs, 571 based on Foata normal form. 8/6507 useless extension candidates. Maximal degree in co-relation 117531. Up to 5108 conditions per place. [2024-06-28 04:32:28,893 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 658 selfloop transitions, 144 changer transitions 0/807 dead transitions. [2024-06-28 04:32:28,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 807 transitions, 26332 flow [2024-06-28 04:32:28,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:32:28,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:32:28,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-28 04:32:28,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-28 04:32:28,896 INFO L175 Difference]: Start difference. First operand has 459 places, 743 transitions, 23551 flow. Second operand 10 states and 187 transitions. [2024-06-28 04:32:28,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 807 transitions, 26332 flow [2024-06-28 04:32:34,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 807 transitions, 26107 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 04:32:34,221 INFO L231 Difference]: Finished difference. Result has 464 places, 755 transitions, 24282 flow [2024-06-28 04:32:34,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=23326, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=24282, PETRI_PLACES=464, PETRI_TRANSITIONS=755} [2024-06-28 04:32:34,222 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 420 predicate places. [2024-06-28 04:32:34,222 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 755 transitions, 24282 flow [2024-06-28 04:32:34,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:34,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:34,222 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] [2024-06-28 04:32:34,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 04:32:34,223 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)] === [2024-06-28 04:32:34,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:34,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1912116747, now seen corresponding path program 3 times [2024-06-28 04:32:34,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:34,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98417631] [2024-06-28 04:32:34,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:34,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:37,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:37,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98417631] [2024-06-28 04:32:37,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98417631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:37,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:37,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:32:37,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153498700] [2024-06-28 04:32:37,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:37,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:32:37,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:37,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:32:37,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:32:37,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:32:37,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 755 transitions, 24282 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:37,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:37,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:32:37,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:41,032 INFO L124 PetriNetUnfolderBase]: 4137/6701 cut-off events. [2024-06-28 04:32:41,032 INFO L125 PetriNetUnfolderBase]: For 2187045/2187045 co-relation queries the response was YES. [2024-06-28 04:32:41,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122739 conditions, 6701 events. 4137/6701 cut-off events. For 2187045/2187045 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 42801 event pairs, 727 based on Foata normal form. 1/6700 useless extension candidates. Maximal degree in co-relation 122526. Up to 5111 conditions per place. [2024-06-28 04:32:41,159 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 544 selfloop transitions, 299 changer transitions 0/848 dead transitions. [2024-06-28 04:32:41,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 848 transitions, 27967 flow [2024-06-28 04:32:41,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:32:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:32:41,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 216 transitions. [2024-06-28 04:32:41,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-28 04:32:41,161 INFO L175 Difference]: Start difference. First operand has 464 places, 755 transitions, 24282 flow. Second operand 12 states and 216 transitions. [2024-06-28 04:32:41,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 848 transitions, 27967 flow [2024-06-28 04:32:46,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 848 transitions, 27746 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 04:32:46,688 INFO L231 Difference]: Finished difference. Result has 473 places, 797 transitions, 26609 flow [2024-06-28 04:32:46,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=24061, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=26609, PETRI_PLACES=473, PETRI_TRANSITIONS=797} [2024-06-28 04:32:46,689 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 429 predicate places. [2024-06-28 04:32:46,689 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 797 transitions, 26609 flow [2024-06-28 04:32:46,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:46,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:46,690 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, 1] [2024-06-28 04:32:46,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 04:32:46,690 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)] === [2024-06-28 04:32:46,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:46,690 INFO L85 PathProgramCache]: Analyzing trace with hash 736495599, now seen corresponding path program 4 times [2024-06-28 04:32:46,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:46,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614934543] [2024-06-28 04:32:46,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:46,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:50,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:50,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614934543] [2024-06-28 04:32:50,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614934543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:50,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:50,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:32:50,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798604111] [2024-06-28 04:32:50,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:50,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:32:50,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:50,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:32:50,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:32:50,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:32:50,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 797 transitions, 26609 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:50,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:50,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:32:50,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:53,920 INFO L124 PetriNetUnfolderBase]: 4175/6763 cut-off events. [2024-06-28 04:32:53,920 INFO L125 PetriNetUnfolderBase]: For 2279480/2279480 co-relation queries the response was YES. [2024-06-28 04:32:54,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125524 conditions, 6763 events. 4175/6763 cut-off events. For 2279480/2279480 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 43258 event pairs, 857 based on Foata normal form. 10/6771 useless extension candidates. Maximal degree in co-relation 125308. Up to 6269 conditions per place. [2024-06-28 04:32:54,061 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 746 selfloop transitions, 107 changer transitions 0/858 dead transitions. [2024-06-28 04:32:54,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 858 transitions, 29171 flow [2024-06-28 04:32:54,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:32:54,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:32:54,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-28 04:32:54,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-28 04:32:54,062 INFO L175 Difference]: Start difference. First operand has 473 places, 797 transitions, 26609 flow. Second operand 10 states and 182 transitions. [2024-06-28 04:32:54,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 858 transitions, 29171 flow [2024-06-28 04:33:00,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 858 transitions, 29041 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-28 04:33:00,176 INFO L231 Difference]: Finished difference. Result has 481 places, 818 transitions, 27392 flow [2024-06-28 04:33:00,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=26479, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=27392, PETRI_PLACES=481, PETRI_TRANSITIONS=818} [2024-06-28 04:33:00,177 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 437 predicate places. [2024-06-28 04:33:00,177 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 818 transitions, 27392 flow [2024-06-28 04:33:00,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:00,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:00,177 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] [2024-06-28 04:33:00,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 04:33:00,177 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)] === [2024-06-28 04:33:00,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:00,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1757653745, now seen corresponding path program 1 times [2024-06-28 04:33:00,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:00,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844830549] [2024-06-28 04:33:00,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:00,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:03,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:03,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844830549] [2024-06-28 04:33:03,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844830549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:03,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:03,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:33:03,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812340144] [2024-06-28 04:33:03,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:03,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:33:03,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:03,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:33:03,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:33:03,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:33:03,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 818 transitions, 27392 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:03,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:03,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:33:03,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:07,158 INFO L124 PetriNetUnfolderBase]: 4300/6945 cut-off events. [2024-06-28 04:33:07,159 INFO L125 PetriNetUnfolderBase]: For 2392452/2392452 co-relation queries the response was YES. [2024-06-28 04:33:07,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130083 conditions, 6945 events. 4300/6945 cut-off events. For 2392452/2392452 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 44384 event pairs, 892 based on Foata normal form. 4/6946 useless extension candidates. Maximal degree in co-relation 129864. Up to 6439 conditions per place. [2024-06-28 04:33:07,296 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 820 selfloop transitions, 64 changer transitions 0/889 dead transitions. [2024-06-28 04:33:07,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 889 transitions, 30624 flow [2024-06-28 04:33:07,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:33:07,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:33:07,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 204 transitions. [2024-06-28 04:33:07,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 04:33:07,297 INFO L175 Difference]: Start difference. First operand has 481 places, 818 transitions, 27392 flow. Second operand 12 states and 204 transitions. [2024-06-28 04:33:07,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 889 transitions, 30624 flow [2024-06-28 04:33:13,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 889 transitions, 30339 flow, removed 97 selfloop flow, removed 3 redundant places. [2024-06-28 04:33:13,566 INFO L231 Difference]: Finished difference. Result has 493 places, 845 transitions, 28297 flow [2024-06-28 04:33:13,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=27107, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=28297, PETRI_PLACES=493, PETRI_TRANSITIONS=845} [2024-06-28 04:33:13,567 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 449 predicate places. [2024-06-28 04:33:13,567 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 845 transitions, 28297 flow [2024-06-28 04:33:13,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:13,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:13,567 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] [2024-06-28 04:33:13,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 04:33:13,567 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)] === [2024-06-28 04:33:13,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:13,568 INFO L85 PathProgramCache]: Analyzing trace with hash -34822781, now seen corresponding path program 1 times [2024-06-28 04:33:13,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:13,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549344001] [2024-06-28 04:33:13,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:13,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:16,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:16,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:16,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549344001] [2024-06-28 04:33:16,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549344001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:16,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:16,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:33:16,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566363730] [2024-06-28 04:33:16,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:16,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:33:16,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:16,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:33:16,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:33:16,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:33:16,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 845 transitions, 28297 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:16,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:16,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:33:16,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:20,837 INFO L124 PetriNetUnfolderBase]: 4315/6974 cut-off events. [2024-06-28 04:33:20,838 INFO L125 PetriNetUnfolderBase]: For 2426267/2426267 co-relation queries the response was YES. [2024-06-28 04:33:20,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131529 conditions, 6974 events. 4315/6974 cut-off events. For 2426267/2426267 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 44700 event pairs, 888 based on Foata normal form. 3/6974 useless extension candidates. Maximal degree in co-relation 131306. Up to 6536 conditions per place. [2024-06-28 04:33:20,974 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 826 selfloop transitions, 61 changer transitions 0/892 dead transitions. [2024-06-28 04:33:20,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 892 transitions, 30791 flow [2024-06-28 04:33:20,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:33:20,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:33:20,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-28 04:33:20,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-28 04:33:20,975 INFO L175 Difference]: Start difference. First operand has 493 places, 845 transitions, 28297 flow. Second operand 12 states and 195 transitions. [2024-06-28 04:33:20,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 892 transitions, 30791 flow [2024-06-28 04:33:27,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 892 transitions, 30451 flow, removed 132 selfloop flow, removed 6 redundant places. [2024-06-28 04:33:27,106 INFO L231 Difference]: Finished difference. Result has 499 places, 851 transitions, 28493 flow [2024-06-28 04:33:27,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=27957, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=784, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=28493, PETRI_PLACES=499, PETRI_TRANSITIONS=851} [2024-06-28 04:33:27,107 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 455 predicate places. [2024-06-28 04:33:27,107 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 851 transitions, 28493 flow [2024-06-28 04:33:27,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:27,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:27,107 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] [2024-06-28 04:33:27,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 04:33:27,107 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)] === [2024-06-28 04:33:27,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:27,108 INFO L85 PathProgramCache]: Analyzing trace with hash 864211597, now seen corresponding path program 1 times [2024-06-28 04:33:27,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:27,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984309785] [2024-06-28 04:33:27,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:27,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:31,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:31,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984309785] [2024-06-28 04:33:31,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984309785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:31,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:31,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:33:31,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94499509] [2024-06-28 04:33:31,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:31,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:33:31,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:31,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:33:31,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:33:31,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:33:31,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 851 transitions, 28493 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:31,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:31,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:33:31,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:35,163 INFO L124 PetriNetUnfolderBase]: 4359/7028 cut-off events. [2024-06-28 04:33:35,163 INFO L125 PetriNetUnfolderBase]: For 2536057/2536057 co-relation queries the response was YES. [2024-06-28 04:33:35,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133286 conditions, 7028 events. 4359/7028 cut-off events. For 2536057/2536057 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 44943 event pairs, 885 based on Foata normal form. 12/7038 useless extension candidates. Maximal degree in co-relation 133062. Up to 6636 conditions per place. [2024-06-28 04:33:35,312 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 852 selfloop transitions, 31 changer transitions 0/888 dead transitions. [2024-06-28 04:33:35,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 888 transitions, 30699 flow [2024-06-28 04:33:35,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:33:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:33:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-28 04:33:35,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930232558139535 [2024-06-28 04:33:35,313 INFO L175 Difference]: Start difference. First operand has 499 places, 851 transitions, 28493 flow. Second operand 10 states and 169 transitions. [2024-06-28 04:33:35,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 888 transitions, 30699 flow [2024-06-28 04:33:42,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 888 transitions, 30416 flow, removed 85 selfloop flow, removed 10 redundant places. [2024-06-28 04:33:42,865 INFO L231 Difference]: Finished difference. Result has 499 places, 853 transitions, 28439 flow [2024-06-28 04:33:42,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=28210, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=820, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=28439, PETRI_PLACES=499, PETRI_TRANSITIONS=853} [2024-06-28 04:33:42,866 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 455 predicate places. [2024-06-28 04:33:42,866 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 853 transitions, 28439 flow [2024-06-28 04:33:42,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:42,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:42,866 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] [2024-06-28 04:33:42,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 04:33:42,867 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)] === [2024-06-28 04:33:42,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:42,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1757480765, now seen corresponding path program 2 times [2024-06-28 04:33:42,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:42,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352497655] [2024-06-28 04:33:42,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:42,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:46,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:46,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:46,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352497655] [2024-06-28 04:33:46,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352497655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:46,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:46,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:33:46,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197508732] [2024-06-28 04:33:46,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:46,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:33:46,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:46,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:33:46,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:33:46,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 04:33:46,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 853 transitions, 28439 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:46,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:46,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 04:33:46,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand