./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi006_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/rfi006_power.oepc.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/rfi006_power.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/rfi006_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 18:41:01,028 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:41:01,103 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:41:01,108 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:41:01,109 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:41:01,134 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:41:01,134 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:41:01,134 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:41:01,135 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:41:01,140 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:41:01,140 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:41:01,140 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:41:01,141 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:41:01,142 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:41:01,142 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:41:01,143 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:41:01,143 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:41:01,143 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:41:01,143 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:41:01,143 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:41:01,144 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:41:01,144 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:41:01,144 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:41:01,144 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:41:01,145 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:41:01,145 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:41:01,145 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:41:01,145 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:41:01,146 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:41:01,146 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:41:01,147 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:41:01,147 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:41:01,147 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:41:01,147 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:41:01,147 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:41:01,148 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:41:01,148 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:41:01,148 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:41:01,148 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:41:01,148 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:41:01,148 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:41:01,149 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:41:01,149 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:41:01,149 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:41:01,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:41:01,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:41:01,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:41:01,365 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:41:01,365 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:41:01,367 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/rfi006_power.oepc.yml/witness.yml [2024-06-27 18:41:01,562 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:41:01,562 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:41:01,563 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi006_power.oepc.i [2024-06-27 18:41:02,651 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:41:02,887 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:41:02,887 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi006_power.oepc.i [2024-06-27 18:41:02,906 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f546aa080/a251c0536f3d4a499102106fd650b9cc/FLAGad73a07e8 [2024-06-27 18:41:02,919 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f546aa080/a251c0536f3d4a499102106fd650b9cc [2024-06-27 18:41:02,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:41:02,921 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:41:02,922 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:41:02,922 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:41:02,926 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:41:02,926 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:41:01" (1/2) ... [2024-06-27 18:41:02,927 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73a58006 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:41:02, skipping insertion in model container [2024-06-27 18:41:02,927 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:41:01" (1/2) ... [2024-06-27 18:41:02,928 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2d7c917b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:41:02, skipping insertion in model container [2024-06-27 18:41:02,928 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:41:02" (2/2) ... [2024-06-27 18:41:02,929 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73a58006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:41:02, skipping insertion in model container [2024-06-27 18:41:02,929 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:41:02" (2/2) ... [2024-06-27 18:41:02,929 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:41:03,039 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:41:03,040 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 18:41:03,040 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 18:41:03,040 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 18:41:03,041 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:41:03,041 INFO L106 edCorrectnessWitness]: ghost_update [L849-L849] multithreaded = 1; [2024-06-27 18:41:03,078 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:41:03,223 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi006_power.oepc.i[994,1007] [2024-06-27 18:41:03,418 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:41:03,424 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 18:41:03,457 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi006_power.oepc.i[994,1007] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:41:03,552 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:41:03,588 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:41:03,589 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:41:03 WrapperNode [2024-06-27 18:41:03,589 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:41:03,591 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:41:03,591 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:41:03,591 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:41:03,597 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:41:03" (1/1) ... [2024-06-27 18:41:03,640 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:41:03" (1/1) ... [2024-06-27 18:41:03,672 INFO L138 Inliner]: procedures = 175, calls = 75, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 170 [2024-06-27 18:41:03,674 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:41:03,675 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:41:03,675 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:41:03,675 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:41:03,684 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:41:03" (1/1) ... [2024-06-27 18:41:03,684 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:41:03" (1/1) ... [2024-06-27 18:41:03,697 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:41:03" (1/1) ... [2024-06-27 18:41:03,725 INFO L175 MemorySlicer]: Split 35 memory accesses to 2 slices as follows [2, 33]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-27 18:41:03,727 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:41:03" (1/1) ... [2024-06-27 18:41:03,727 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:41:03" (1/1) ... [2024-06-27 18:41:03,738 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:41:03" (1/1) ... [2024-06-27 18:41:03,746 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:41:03" (1/1) ... [2024-06-27 18:41:03,749 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:41:03" (1/1) ... [2024-06-27 18:41:03,753 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:41:03" (1/1) ... [2024-06-27 18:41:03,760 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:41:03,761 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:41:03,762 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:41:03,762 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:41:03,763 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:41:03" (1/1) ... [2024-06-27 18:41:03,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:41:03,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:41:03,797 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) [2024-06-27 18:41:03,810 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 [2024-06-27 18:41:03,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 18:41:03,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 18:41:03,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 18:41:03,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 18:41:03,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:41:03,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:41:03,836 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 18:41:03,836 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 18:41:03,837 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 18:41:03,837 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 18:41:03,837 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 18:41:03,838 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 18:41:03,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:41:03,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 18:41:03,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:41:03,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:41:03,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:41:03,841 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 18:41:04,003 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:41:04,004 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:41:04,383 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:41:04,383 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:41:04,667 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:41:04,668 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 18:41:04,668 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:41:04 BoogieIcfgContainer [2024-06-27 18:41:04,668 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:41:04,670 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:41:04,670 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:41:04,672 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:41:04,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:41:01" (1/4) ... [2024-06-27 18:41:04,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a9e9daf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:41:04, skipping insertion in model container [2024-06-27 18:41:04,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:41:02" (2/4) ... [2024-06-27 18:41:04,674 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a9e9daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:41:04, skipping insertion in model container [2024-06-27 18:41:04,674 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:41:03" (3/4) ... [2024-06-27 18:41:04,674 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a9e9daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:41:04, skipping insertion in model container [2024-06-27 18:41:04,674 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:41:04" (4/4) ... [2024-06-27 18:41:04,675 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi006_power.oepc.i [2024-06-27 18:41:04,690 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:41:04,690 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 18:41:04,690 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:41:04,743 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 18:41:04,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 18:41:04,806 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-06-27 18:41:04,806 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:41:04,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 44 events. 1/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-06-27 18:41:04,810 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 18:41:04,813 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 41 transitions, 91 flow [2024-06-27 18:41:04,825 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:41:04,834 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;@1757a0fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:41:04,835 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 18:41:04,840 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:41:04,840 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 18:41:04,841 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:41:04,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:04,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:41:04,842 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:04,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:04,846 INFO L85 PathProgramCache]: Analyzing trace with hash 721421140, now seen corresponding path program 1 times [2024-06-27 18:41:04,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:04,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051731011] [2024-06-27 18:41:04,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:04,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:06,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:06,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051731011] [2024-06-27 18:41:06,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051731011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:06,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:06,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:41:06,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385789746] [2024-06-27 18:41:06,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:06,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:41:06,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:06,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:41:06,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:41:06,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 18:41:06,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:06,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:06,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 18:41:06,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:07,272 INFO L124 PetriNetUnfolderBase]: 2790/4431 cut-off events. [2024-06-27 18:41:07,273 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 18:41:07,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8561 conditions, 4431 events. 2790/4431 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 25599 event pairs, 1780 based on Foata normal form. 0/4271 useless extension candidates. Maximal degree in co-relation 8549. Up to 4049 conditions per place. [2024-06-27 18:41:07,296 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 44 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-27 18:41:07,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 58 transitions, 229 flow [2024-06-27 18:41:07,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:41:07,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:41:07,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-06-27 18:41:07,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6453900709219859 [2024-06-27 18:41:07,307 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 91 flow. Second operand 3 states and 91 transitions. [2024-06-27 18:41:07,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 58 transitions, 229 flow [2024-06-27 18:41:07,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 224 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:41:07,311 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 125 flow [2024-06-27 18:41:07,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-27 18:41:07,315 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-06-27 18:41:07,315 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 125 flow [2024-06-27 18:41:07,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:07,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:07,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:07,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:41:07,316 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:07,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:07,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1796033171, now seen corresponding path program 1 times [2024-06-27 18:41:07,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:07,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899603024] [2024-06-27 18:41:07,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:07,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:09,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:09,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899603024] [2024-06-27 18:41:09,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899603024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:09,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:09,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:41:09,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730496631] [2024-06-27 18:41:09,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:09,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:41:09,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:09,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:41:09,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:41:09,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 18:41:09,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:09,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:09,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 18:41:09,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:10,263 INFO L124 PetriNetUnfolderBase]: 2784/4242 cut-off events. [2024-06-27 18:41:10,264 INFO L125 PetriNetUnfolderBase]: For 719/719 co-relation queries the response was YES. [2024-06-27 18:41:10,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9389 conditions, 4242 events. 2784/4242 cut-off events. For 719/719 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 23319 event pairs, 1304 based on Foata normal form. 3/4238 useless extension candidates. Maximal degree in co-relation 9377. Up to 4007 conditions per place. [2024-06-27 18:41:10,282 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 61 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-06-27 18:41:10,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 357 flow [2024-06-27 18:41:10,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:41:10,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:41:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-27 18:41:10,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6542553191489362 [2024-06-27 18:41:10,284 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 125 flow. Second operand 4 states and 123 transitions. [2024-06-27 18:41:10,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 357 flow [2024-06-27 18:41:10,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 352 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:41:10,287 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 188 flow [2024-06-27 18:41:10,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-27 18:41:10,288 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2024-06-27 18:41:10,288 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 188 flow [2024-06-27 18:41:10,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:10,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:10,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:10,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:41:10,289 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:10,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:10,289 INFO L85 PathProgramCache]: Analyzing trace with hash -157544852, now seen corresponding path program 1 times [2024-06-27 18:41:10,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:10,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60265821] [2024-06-27 18:41:10,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:10,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:12,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:12,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60265821] [2024-06-27 18:41:12,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60265821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:12,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:12,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:41:12,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760503123] [2024-06-27 18:41:12,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:12,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:41:12,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:12,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:41:12,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:41:12,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:41:12,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:12,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:12,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:41:12,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:13,934 INFO L124 PetriNetUnfolderBase]: 3417/5065 cut-off events. [2024-06-27 18:41:13,935 INFO L125 PetriNetUnfolderBase]: For 2813/2813 co-relation queries the response was YES. [2024-06-27 18:41:13,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12616 conditions, 5065 events. 3417/5065 cut-off events. For 2813/2813 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 27243 event pairs, 1119 based on Foata normal form. 5/5065 useless extension candidates. Maximal degree in co-relation 12601. Up to 4756 conditions per place. [2024-06-27 18:41:13,959 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 85 selfloop transitions, 18 changer transitions 0/111 dead transitions. [2024-06-27 18:41:13,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 111 transitions, 570 flow [2024-06-27 18:41:13,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:41:13,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:41:13,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-27 18:41:13,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6723404255319149 [2024-06-27 18:41:13,964 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 188 flow. Second operand 5 states and 158 transitions. [2024-06-27 18:41:13,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 111 transitions, 570 flow [2024-06-27 18:41:13,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 111 transitions, 570 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 18:41:13,974 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 310 flow [2024-06-27 18:41:13,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2024-06-27 18:41:13,975 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2024-06-27 18:41:13,975 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 310 flow [2024-06-27 18:41:13,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:13,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:13,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:13,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:41:13,976 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:13,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:13,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1076692149, now seen corresponding path program 1 times [2024-06-27 18:41:13,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:13,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743900213] [2024-06-27 18:41:13,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:13,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:16,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:16,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743900213] [2024-06-27 18:41:16,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743900213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:16,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:16,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:41:16,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108740920] [2024-06-27 18:41:16,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:16,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:41:16,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:16,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:41:16,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:41:16,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:41:16,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:16,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:16,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:41:16,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:18,100 INFO L124 PetriNetUnfolderBase]: 3462/5132 cut-off events. [2024-06-27 18:41:18,101 INFO L125 PetriNetUnfolderBase]: For 6211/6214 co-relation queries the response was YES. [2024-06-27 18:41:18,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14895 conditions, 5132 events. 3462/5132 cut-off events. For 6211/6214 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 27689 event pairs, 752 based on Foata normal form. 12/5139 useless extension candidates. Maximal degree in co-relation 14875. Up to 4711 conditions per place. [2024-06-27 18:41:18,138 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 96 selfloop transitions, 21 changer transitions 0/125 dead transitions. [2024-06-27 18:41:18,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 125 transitions, 724 flow [2024-06-27 18:41:18,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:41:18,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:41:18,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-27 18:41:18,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6524822695035462 [2024-06-27 18:41:18,140 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 310 flow. Second operand 6 states and 184 transitions. [2024-06-27 18:41:18,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 125 transitions, 724 flow [2024-06-27 18:41:18,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 125 transitions, 718 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 18:41:18,151 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 372 flow [2024-06-27 18:41:18,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=372, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-06-27 18:41:18,152 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2024-06-27 18:41:18,153 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 372 flow [2024-06-27 18:41:18,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:18,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:18,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:18,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:41:18,154 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:18,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:18,154 INFO L85 PathProgramCache]: Analyzing trace with hash 31945756, now seen corresponding path program 1 times [2024-06-27 18:41:18,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:18,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131106935] [2024-06-27 18:41:18,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:18,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:18,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:19,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:19,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131106935] [2024-06-27 18:41:19,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131106935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:19,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:19,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:41:19,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303774315] [2024-06-27 18:41:19,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:19,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:41:19,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:19,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:41:19,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:41:19,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:41:19,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 372 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:19,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:19,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:41:19,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:20,609 INFO L124 PetriNetUnfolderBase]: 3457/5396 cut-off events. [2024-06-27 18:41:20,609 INFO L125 PetriNetUnfolderBase]: For 7942/7942 co-relation queries the response was YES. [2024-06-27 18:41:20,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15986 conditions, 5396 events. 3457/5396 cut-off events. For 7942/7942 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 30916 event pairs, 1344 based on Foata normal form. 2/5393 useless extension candidates. Maximal degree in co-relation 15962. Up to 4975 conditions per place. [2024-06-27 18:41:20,639 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 73 selfloop transitions, 10 changer transitions 0/90 dead transitions. [2024-06-27 18:41:20,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 90 transitions, 622 flow [2024-06-27 18:41:20,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:41:20,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:41:20,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-27 18:41:20,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-27 18:41:20,643 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 372 flow. Second operand 5 states and 120 transitions. [2024-06-27 18:41:20,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 90 transitions, 622 flow [2024-06-27 18:41:20,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 90 transitions, 568 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 18:41:20,657 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 389 flow [2024-06-27 18:41:20,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=389, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-27 18:41:20,659 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2024-06-27 18:41:20,659 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 389 flow [2024-06-27 18:41:20,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:20,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:20,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:20,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:41:20,660 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:20,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:20,661 INFO L85 PathProgramCache]: Analyzing trace with hash 989599777, now seen corresponding path program 1 times [2024-06-27 18:41:20,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:20,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483800798] [2024-06-27 18:41:20,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:20,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:22,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:22,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483800798] [2024-06-27 18:41:22,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483800798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:22,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:22,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:41:22,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168197966] [2024-06-27 18:41:22,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:22,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:41:22,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:22,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:41:22,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:41:22,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:41:22,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 389 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:22,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:22,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:41:22,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:23,945 INFO L124 PetriNetUnfolderBase]: 3447/5384 cut-off events. [2024-06-27 18:41:23,945 INFO L125 PetriNetUnfolderBase]: For 8459/8459 co-relation queries the response was YES. [2024-06-27 18:41:23,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15909 conditions, 5384 events. 3447/5384 cut-off events. For 8459/8459 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 30786 event pairs, 1258 based on Foata normal form. 4/5386 useless extension candidates. Maximal degree in co-relation 15883. Up to 4923 conditions per place. [2024-06-27 18:41:24,027 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 83 selfloop transitions, 14 changer transitions 0/104 dead transitions. [2024-06-27 18:41:24,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 104 transitions, 679 flow [2024-06-27 18:41:24,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:41:24,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:41:24,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 18:41:24,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141843971631206 [2024-06-27 18:41:24,029 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 389 flow. Second operand 6 states and 145 transitions. [2024-06-27 18:41:24,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 104 transitions, 679 flow [2024-06-27 18:41:24,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 654 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 18:41:24,037 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 433 flow [2024-06-27 18:41:24,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=433, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-27 18:41:24,040 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 20 predicate places. [2024-06-27 18:41:24,040 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 433 flow [2024-06-27 18:41:24,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:24,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:24,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:24,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:41:24,041 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:24,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:24,041 INFO L85 PathProgramCache]: Analyzing trace with hash 612608811, now seen corresponding path program 1 times [2024-06-27 18:41:24,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:24,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131449502] [2024-06-27 18:41:24,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:24,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:26,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:26,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131449502] [2024-06-27 18:41:26,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131449502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:26,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:26,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:41:26,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981592367] [2024-06-27 18:41:26,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:26,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:41:26,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:26,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:41:26,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:41:26,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:41:26,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 433 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:26,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:26,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:41:26,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:27,789 INFO L124 PetriNetUnfolderBase]: 3473/5189 cut-off events. [2024-06-27 18:41:27,789 INFO L125 PetriNetUnfolderBase]: For 11039/11048 co-relation queries the response was YES. [2024-06-27 18:41:27,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16872 conditions, 5189 events. 3473/5189 cut-off events. For 11039/11048 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 28218 event pairs, 1059 based on Foata normal form. 10/5196 useless extension candidates. Maximal degree in co-relation 16845. Up to 4821 conditions per place. [2024-06-27 18:41:27,844 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 86 selfloop transitions, 24 changer transitions 0/117 dead transitions. [2024-06-27 18:41:27,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 117 transitions, 805 flow [2024-06-27 18:41:27,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:41:27,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:41:27,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 18:41:27,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567375886524822 [2024-06-27 18:41:27,846 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 433 flow. Second operand 6 states and 157 transitions. [2024-06-27 18:41:27,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 117 transitions, 805 flow [2024-06-27 18:41:27,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 117 transitions, 766 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 18:41:27,855 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 476 flow [2024-06-27 18:41:27,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=476, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-27 18:41:27,856 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 22 predicate places. [2024-06-27 18:41:27,856 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 476 flow [2024-06-27 18:41:27,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:27,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:27,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:27,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:41:27,857 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:27,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:27,857 INFO L85 PathProgramCache]: Analyzing trace with hash 635159451, now seen corresponding path program 2 times [2024-06-27 18:41:27,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:27,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438580326] [2024-06-27 18:41:27,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:27,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:29,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:29,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438580326] [2024-06-27 18:41:29,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438580326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:29,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:29,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:41:29,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101439358] [2024-06-27 18:41:29,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:29,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:41:29,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:29,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:41:29,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:41:29,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:41:29,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 476 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:29,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:29,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:41:29,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:31,387 INFO L124 PetriNetUnfolderBase]: 3461/5152 cut-off events. [2024-06-27 18:41:31,388 INFO L125 PetriNetUnfolderBase]: For 12328/12328 co-relation queries the response was YES. [2024-06-27 18:41:31,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17049 conditions, 5152 events. 3461/5152 cut-off events. For 12328/12328 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 27813 event pairs, 1085 based on Foata normal form. 2/5148 useless extension candidates. Maximal degree in co-relation 17021. Up to 4805 conditions per place. [2024-06-27 18:41:31,448 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 80 selfloop transitions, 25 changer transitions 0/112 dead transitions. [2024-06-27 18:41:31,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 112 transitions, 786 flow [2024-06-27 18:41:31,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:41:31,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:41:31,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 18:41:31,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390070921985816 [2024-06-27 18:41:31,465 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 476 flow. Second operand 6 states and 152 transitions. [2024-06-27 18:41:31,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 112 transitions, 786 flow [2024-06-27 18:41:31,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 112 transitions, 753 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 18:41:31,478 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 502 flow [2024-06-27 18:41:31,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=502, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2024-06-27 18:41:31,480 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 25 predicate places. [2024-06-27 18:41:31,480 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 502 flow [2024-06-27 18:41:31,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:31,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:31,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:31,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:41:31,480 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:31,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:31,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1202657488, now seen corresponding path program 1 times [2024-06-27 18:41:31,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:31,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989430825] [2024-06-27 18:41:31,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:31,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:33,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:33,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989430825] [2024-06-27 18:41:33,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989430825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:33,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:33,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:41:33,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756052150] [2024-06-27 18:41:33,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:33,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:41:33,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:33,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:41:33,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:41:33,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:41:33,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 502 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:33,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:33,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:41:33,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:35,475 INFO L124 PetriNetUnfolderBase]: 3957/5920 cut-off events. [2024-06-27 18:41:35,477 INFO L125 PetriNetUnfolderBase]: For 17034/17034 co-relation queries the response was YES. [2024-06-27 18:41:35,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20517 conditions, 5920 events. 3957/5920 cut-off events. For 17034/17034 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 32503 event pairs, 903 based on Foata normal form. 8/5922 useless extension candidates. Maximal degree in co-relation 20488. Up to 4860 conditions per place. [2024-06-27 18:41:35,537 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 126 selfloop transitions, 47 changer transitions 0/180 dead transitions. [2024-06-27 18:41:35,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 180 transitions, 1388 flow [2024-06-27 18:41:35,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:41:35,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:41:35,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-27 18:41:35,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5877659574468085 [2024-06-27 18:41:35,540 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 502 flow. Second operand 8 states and 221 transitions. [2024-06-27 18:41:35,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 180 transitions, 1388 flow [2024-06-27 18:41:35,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 180 transitions, 1284 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 18:41:35,558 INFO L231 Difference]: Finished difference. Result has 83 places, 103 transitions, 822 flow [2024-06-27 18:41:35,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=822, PETRI_PLACES=83, PETRI_TRANSITIONS=103} [2024-06-27 18:41:35,559 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 32 predicate places. [2024-06-27 18:41:35,559 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 103 transitions, 822 flow [2024-06-27 18:41:35,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:35,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:35,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:35,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:41:35,560 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:35,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:35,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1792815918, now seen corresponding path program 2 times [2024-06-27 18:41:35,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:35,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893303408] [2024-06-27 18:41:35,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:35,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:38,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:38,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893303408] [2024-06-27 18:41:38,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893303408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:38,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:38,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:41:38,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361022792] [2024-06-27 18:41:38,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:38,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:41:38,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:38,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:41:38,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:41:38,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:41:38,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 103 transitions, 822 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:38,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:38,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:41:38,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:40,203 INFO L124 PetriNetUnfolderBase]: 4189/6284 cut-off events. [2024-06-27 18:41:40,203 INFO L125 PetriNetUnfolderBase]: For 24223/24229 co-relation queries the response was YES. [2024-06-27 18:41:40,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24468 conditions, 6284 events. 4189/6284 cut-off events. For 24223/24229 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 34895 event pairs, 957 based on Foata normal form. 16/6294 useless extension candidates. Maximal degree in co-relation 24434. Up to 5012 conditions per place. [2024-06-27 18:41:40,237 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 108 selfloop transitions, 55 changer transitions 0/170 dead transitions. [2024-06-27 18:41:40,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 170 transitions, 1440 flow [2024-06-27 18:41:40,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:41:40,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:41:40,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-27 18:41:40,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 18:41:40,239 INFO L175 Difference]: Start difference. First operand has 83 places, 103 transitions, 822 flow. Second operand 7 states and 188 transitions. [2024-06-27 18:41:40,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 170 transitions, 1440 flow [2024-06-27 18:41:40,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 170 transitions, 1424 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 18:41:40,263 INFO L231 Difference]: Finished difference. Result has 89 places, 110 transitions, 1001 flow [2024-06-27 18:41:40,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1001, PETRI_PLACES=89, PETRI_TRANSITIONS=110} [2024-06-27 18:41:40,264 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 38 predicate places. [2024-06-27 18:41:40,264 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 110 transitions, 1001 flow [2024-06-27 18:41:40,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:40,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:40,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:40,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:41:40,265 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:40,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:40,265 INFO L85 PathProgramCache]: Analyzing trace with hash -69477364, now seen corresponding path program 3 times [2024-06-27 18:41:40,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:40,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742111610] [2024-06-27 18:41:40,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:40,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:42,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:42,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742111610] [2024-06-27 18:41:42,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742111610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:42,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:42,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:41:42,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741444716] [2024-06-27 18:41:42,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:42,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:41:42,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:42,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:41:42,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:41:42,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:41:42,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 110 transitions, 1001 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:42,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:42,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:41:42,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:44,828 INFO L124 PetriNetUnfolderBase]: 4305/6437 cut-off events. [2024-06-27 18:41:44,828 INFO L125 PetriNetUnfolderBase]: For 30341/30345 co-relation queries the response was YES. [2024-06-27 18:41:44,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26849 conditions, 6437 events. 4305/6437 cut-off events. For 30341/30345 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 35409 event pairs, 960 based on Foata normal form. 8/6432 useless extension candidates. Maximal degree in co-relation 26812. Up to 5066 conditions per place. [2024-06-27 18:41:44,872 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 108 selfloop transitions, 65 changer transitions 0/180 dead transitions. [2024-06-27 18:41:44,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 180 transitions, 1743 flow [2024-06-27 18:41:44,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:41:44,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:41:44,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-27 18:41:44,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 18:41:44,874 INFO L175 Difference]: Start difference. First operand has 89 places, 110 transitions, 1001 flow. Second operand 7 states and 188 transitions. [2024-06-27 18:41:44,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 180 transitions, 1743 flow [2024-06-27 18:41:44,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 180 transitions, 1628 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 18:41:44,920 INFO L231 Difference]: Finished difference. Result has 92 places, 120 transitions, 1160 flow [2024-06-27 18:41:44,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1160, PETRI_PLACES=92, PETRI_TRANSITIONS=120} [2024-06-27 18:41:44,920 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 41 predicate places. [2024-06-27 18:41:44,921 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 120 transitions, 1160 flow [2024-06-27 18:41:44,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:44,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:44,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:44,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:41:44,921 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:44,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:44,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1817672288, now seen corresponding path program 4 times [2024-06-27 18:41:44,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:44,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177223753] [2024-06-27 18:41:44,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:44,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:47,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:47,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177223753] [2024-06-27 18:41:47,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177223753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:47,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:47,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:41:47,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575538566] [2024-06-27 18:41:47,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:47,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:41:47,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:47,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:41:47,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:41:47,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:41:47,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 120 transitions, 1160 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:47,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:47,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:41:47,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:48,983 INFO L124 PetriNetUnfolderBase]: 4289/6423 cut-off events. [2024-06-27 18:41:48,984 INFO L125 PetriNetUnfolderBase]: For 31392/31402 co-relation queries the response was YES. [2024-06-27 18:41:49,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26654 conditions, 6423 events. 4289/6423 cut-off events. For 31392/31402 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 35602 event pairs, 920 based on Foata normal form. 14/6424 useless extension candidates. Maximal degree in co-relation 26616. Up to 5059 conditions per place. [2024-06-27 18:41:49,026 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 104 selfloop transitions, 67 changer transitions 0/178 dead transitions. [2024-06-27 18:41:49,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 178 transitions, 1732 flow [2024-06-27 18:41:49,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:41:49,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:41:49,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-27 18:41:49,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5623100303951368 [2024-06-27 18:41:49,031 INFO L175 Difference]: Start difference. First operand has 92 places, 120 transitions, 1160 flow. Second operand 7 states and 185 transitions. [2024-06-27 18:41:49,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 178 transitions, 1732 flow [2024-06-27 18:41:49,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 178 transitions, 1696 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-27 18:41:49,099 INFO L231 Difference]: Finished difference. Result has 98 places, 120 transitions, 1269 flow [2024-06-27 18:41:49,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1269, PETRI_PLACES=98, PETRI_TRANSITIONS=120} [2024-06-27 18:41:49,099 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 47 predicate places. [2024-06-27 18:41:49,100 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 120 transitions, 1269 flow [2024-06-27 18:41:49,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:49,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:49,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:49,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:41:49,100 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:49,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:49,101 INFO L85 PathProgramCache]: Analyzing trace with hash 651187283, now seen corresponding path program 1 times [2024-06-27 18:41:49,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:49,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228721475] [2024-06-27 18:41:49,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:49,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:52,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:52,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228721475] [2024-06-27 18:41:52,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228721475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:52,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:52,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:41:52,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629219707] [2024-06-27 18:41:52,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:52,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:41:52,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:52,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:41:52,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:41:52,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:41:52,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 120 transitions, 1269 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:52,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:52,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:41:52,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:54,594 INFO L124 PetriNetUnfolderBase]: 4413/6652 cut-off events. [2024-06-27 18:41:54,595 INFO L125 PetriNetUnfolderBase]: For 36601/36607 co-relation queries the response was YES. [2024-06-27 18:41:54,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28470 conditions, 6652 events. 4413/6652 cut-off events. For 36601/36607 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 37413 event pairs, 954 based on Foata normal form. 12/6658 useless extension candidates. Maximal degree in co-relation 28429. Up to 5163 conditions per place. [2024-06-27 18:41:54,638 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 123 selfloop transitions, 69 changer transitions 0/199 dead transitions. [2024-06-27 18:41:54,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 199 transitions, 2015 flow [2024-06-27 18:41:54,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:41:54,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:41:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-27 18:41:54,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691489361702128 [2024-06-27 18:41:54,640 INFO L175 Difference]: Start difference. First operand has 98 places, 120 transitions, 1269 flow. Second operand 8 states and 214 transitions. [2024-06-27 18:41:54,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 199 transitions, 2015 flow [2024-06-27 18:41:54,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 199 transitions, 1857 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 18:41:54,686 INFO L231 Difference]: Finished difference. Result has 100 places, 126 transitions, 1349 flow [2024-06-27 18:41:54,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1349, PETRI_PLACES=100, PETRI_TRANSITIONS=126} [2024-06-27 18:41:54,687 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 49 predicate places. [2024-06-27 18:41:54,687 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 126 transitions, 1349 flow [2024-06-27 18:41:54,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:54,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:54,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:54,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:41:54,688 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:54,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:54,689 INFO L85 PathProgramCache]: Analyzing trace with hash 257277715, now seen corresponding path program 2 times [2024-06-27 18:41:54,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:54,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875584357] [2024-06-27 18:41:54,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:54,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:41:57,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:41:57,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:41:57,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875584357] [2024-06-27 18:41:57,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875584357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:41:57,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:41:57,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:41:57,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193204720] [2024-06-27 18:41:57,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:41:57,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:41:57,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:41:57,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:41:57,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:41:57,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:41:57,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 126 transitions, 1349 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:57,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:41:57,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:41:57,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:41:58,868 INFO L124 PetriNetUnfolderBase]: 4525/6876 cut-off events. [2024-06-27 18:41:58,868 INFO L125 PetriNetUnfolderBase]: For 43318/43326 co-relation queries the response was YES. [2024-06-27 18:41:58,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29309 conditions, 6876 events. 4525/6876 cut-off events. For 43318/43326 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 39270 event pairs, 1011 based on Foata normal form. 16/6886 useless extension candidates. Maximal degree in co-relation 29268. Up to 5258 conditions per place. [2024-06-27 18:41:58,913 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 113 selfloop transitions, 76 changer transitions 0/196 dead transitions. [2024-06-27 18:41:58,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 196 transitions, 2061 flow [2024-06-27 18:41:58,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:41:58,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:41:58,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-27 18:41:58,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866261398176292 [2024-06-27 18:41:58,915 INFO L175 Difference]: Start difference. First operand has 100 places, 126 transitions, 1349 flow. Second operand 7 states and 193 transitions. [2024-06-27 18:41:58,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 196 transitions, 2061 flow [2024-06-27 18:41:58,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 196 transitions, 1895 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 18:41:58,960 INFO L231 Difference]: Finished difference. Result has 101 places, 132 transitions, 1434 flow [2024-06-27 18:41:58,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1434, PETRI_PLACES=101, PETRI_TRANSITIONS=132} [2024-06-27 18:41:58,961 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 50 predicate places. [2024-06-27 18:41:58,961 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 132 transitions, 1434 flow [2024-06-27 18:41:58,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:41:58,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:41:58,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:41:58,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:41:58,961 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:41:58,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:41:58,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1001644445, now seen corresponding path program 3 times [2024-06-27 18:41:58,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:41:58,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730522976] [2024-06-27 18:41:58,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:41:58,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:41:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:01,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:01,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730522976] [2024-06-27 18:42:01,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730522976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:01,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:01,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:42:01,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670686703] [2024-06-27 18:42:01,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:01,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:42:01,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:01,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:42:01,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:42:01,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:42:01,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 132 transitions, 1434 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:01,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:01,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:42:01,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:03,828 INFO L124 PetriNetUnfolderBase]: 4641/6985 cut-off events. [2024-06-27 18:42:03,828 INFO L125 PetriNetUnfolderBase]: For 45971/45975 co-relation queries the response was YES. [2024-06-27 18:42:03,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30417 conditions, 6985 events. 4641/6985 cut-off events. For 45971/45975 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 39232 event pairs, 1014 based on Foata normal form. 8/6976 useless extension candidates. Maximal degree in co-relation 30375. Up to 5356 conditions per place. [2024-06-27 18:42:03,865 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 119 selfloop transitions, 83 changer transitions 0/209 dead transitions. [2024-06-27 18:42:03,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 209 transitions, 2210 flow [2024-06-27 18:42:03,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:42:03,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:42:03,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 18:42:03,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2024-06-27 18:42:03,870 INFO L175 Difference]: Start difference. First operand has 101 places, 132 transitions, 1434 flow. Second operand 8 states and 212 transitions. [2024-06-27 18:42:03,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 209 transitions, 2210 flow [2024-06-27 18:42:03,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 209 transitions, 2016 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 18:42:03,911 INFO L231 Difference]: Finished difference. Result has 104 places, 138 transitions, 1505 flow [2024-06-27 18:42:03,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1505, PETRI_PLACES=104, PETRI_TRANSITIONS=138} [2024-06-27 18:42:03,912 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 53 predicate places. [2024-06-27 18:42:03,912 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 138 transitions, 1505 flow [2024-06-27 18:42:03,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:03,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:03,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:03,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:42:03,913 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:03,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:03,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1247294645, now seen corresponding path program 4 times [2024-06-27 18:42:03,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:03,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136416896] [2024-06-27 18:42:03,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:03,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:06,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:06,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136416896] [2024-06-27 18:42:06,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136416896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:06,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:06,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:42:06,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732912283] [2024-06-27 18:42:06,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:06,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:42:06,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:06,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:42:06,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:42:06,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:42:06,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 138 transitions, 1505 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:06,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:06,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:42:06,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:08,786 INFO L124 PetriNetUnfolderBase]: 4625/7023 cut-off events. [2024-06-27 18:42:08,787 INFO L125 PetriNetUnfolderBase]: For 44335/44343 co-relation queries the response was YES. [2024-06-27 18:42:08,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30358 conditions, 7023 events. 4625/7023 cut-off events. For 44335/44343 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 40290 event pairs, 940 based on Foata normal form. 12/7026 useless extension candidates. Maximal degree in co-relation 30316. Up to 5343 conditions per place. [2024-06-27 18:42:08,832 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 129 selfloop transitions, 85 changer transitions 0/221 dead transitions. [2024-06-27 18:42:08,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 221 transitions, 2211 flow [2024-06-27 18:42:08,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:42:08,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:42:08,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-27 18:42:08,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-27 18:42:08,834 INFO L175 Difference]: Start difference. First operand has 104 places, 138 transitions, 1505 flow. Second operand 9 states and 235 transitions. [2024-06-27 18:42:08,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 221 transitions, 2211 flow [2024-06-27 18:42:08,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 221 transitions, 2075 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 18:42:08,885 INFO L231 Difference]: Finished difference. Result has 108 places, 138 transitions, 1550 flow [2024-06-27 18:42:08,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1550, PETRI_PLACES=108, PETRI_TRANSITIONS=138} [2024-06-27 18:42:08,885 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 57 predicate places. [2024-06-27 18:42:08,885 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 138 transitions, 1550 flow [2024-06-27 18:42:08,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:08,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:08,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:08,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:42:08,886 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:08,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:08,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1461021816, now seen corresponding path program 1 times [2024-06-27 18:42:08,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:08,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398693876] [2024-06-27 18:42:08,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:08,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:11,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:11,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398693876] [2024-06-27 18:42:11,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398693876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:11,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:11,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:42:11,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425962380] [2024-06-27 18:42:11,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:11,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:42:11,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:11,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:42:11,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:42:11,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:42:11,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 138 transitions, 1550 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:11,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:11,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:42:11,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:13,148 INFO L124 PetriNetUnfolderBase]: 4617/7235 cut-off events. [2024-06-27 18:42:13,148 INFO L125 PetriNetUnfolderBase]: For 50689/50691 co-relation queries the response was YES. [2024-06-27 18:42:13,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30862 conditions, 7235 events. 4617/7235 cut-off events. For 50689/50691 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 42680 event pairs, 1445 based on Foata normal form. 4/7237 useless extension candidates. Maximal degree in co-relation 30818. Up to 6499 conditions per place. [2024-06-27 18:42:13,198 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 167 selfloop transitions, 21 changer transitions 0/195 dead transitions. [2024-06-27 18:42:13,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 195 transitions, 2125 flow [2024-06-27 18:42:13,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:42:13,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:42:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 18:42:13,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-27 18:42:13,201 INFO L175 Difference]: Start difference. First operand has 108 places, 138 transitions, 1550 flow. Second operand 8 states and 192 transitions. [2024-06-27 18:42:13,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 195 transitions, 2125 flow [2024-06-27 18:42:13,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 195 transitions, 1831 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 18:42:13,327 INFO L231 Difference]: Finished difference. Result has 107 places, 145 transitions, 1384 flow [2024-06-27 18:42:13,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1384, PETRI_PLACES=107, PETRI_TRANSITIONS=145} [2024-06-27 18:42:13,333 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 56 predicate places. [2024-06-27 18:42:13,333 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 145 transitions, 1384 flow [2024-06-27 18:42:13,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:13,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:13,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:13,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:42:13,334 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:13,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:13,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1788378319, now seen corresponding path program 1 times [2024-06-27 18:42:13,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:13,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279563351] [2024-06-27 18:42:13,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:13,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:13,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:14,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:14,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279563351] [2024-06-27 18:42:14,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279563351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:14,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:14,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:42:14,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648428580] [2024-06-27 18:42:14,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:14,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:42:14,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:14,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:42:14,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:42:14,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:42:14,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 145 transitions, 1384 flow. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:14,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:14,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:42:14,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:15,847 INFO L124 PetriNetUnfolderBase]: 4315/6814 cut-off events. [2024-06-27 18:42:15,848 INFO L125 PetriNetUnfolderBase]: For 42572/42621 co-relation queries the response was YES. [2024-06-27 18:42:15,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28598 conditions, 6814 events. 4315/6814 cut-off events. For 42572/42621 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 40680 event pairs, 1304 based on Foata normal form. 22/6813 useless extension candidates. Maximal degree in co-relation 28553. Up to 6071 conditions per place. [2024-06-27 18:42:15,890 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 143 selfloop transitions, 10 changer transitions 0/168 dead transitions. [2024-06-27 18:42:15,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 168 transitions, 1774 flow [2024-06-27 18:42:15,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:42:15,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:42:15,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-27 18:42:15,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-27 18:42:15,891 INFO L175 Difference]: Start difference. First operand has 107 places, 145 transitions, 1384 flow. Second operand 5 states and 120 transitions. [2024-06-27 18:42:15,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 168 transitions, 1774 flow [2024-06-27 18:42:15,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 168 transitions, 1712 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 18:42:15,943 INFO L231 Difference]: Finished difference. Result has 107 places, 149 transitions, 1391 flow [2024-06-27 18:42:15,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1322, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1391, PETRI_PLACES=107, PETRI_TRANSITIONS=149} [2024-06-27 18:42:15,944 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 56 predicate places. [2024-06-27 18:42:15,944 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 149 transitions, 1391 flow [2024-06-27 18:42:15,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:15,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:15,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:15,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:42:15,945 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:15,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:15,945 INFO L85 PathProgramCache]: Analyzing trace with hash 217362957, now seen corresponding path program 1 times [2024-06-27 18:42:15,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:15,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287092114] [2024-06-27 18:42:15,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:15,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:18,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:18,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287092114] [2024-06-27 18:42:18,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287092114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:18,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:18,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:42:18,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686624044] [2024-06-27 18:42:18,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:18,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:42:18,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:18,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:42:18,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:42:18,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:42:18,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 149 transitions, 1391 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:18,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:18,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:42:18,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:19,919 INFO L124 PetriNetUnfolderBase]: 4661/7084 cut-off events. [2024-06-27 18:42:19,919 INFO L125 PetriNetUnfolderBase]: For 46264/46285 co-relation queries the response was YES. [2024-06-27 18:42:19,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31064 conditions, 7084 events. 4661/7084 cut-off events. For 46264/46285 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 40666 event pairs, 680 based on Foata normal form. 20/7101 useless extension candidates. Maximal degree in co-relation 31018. Up to 6047 conditions per place. [2024-06-27 18:42:19,961 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 165 selfloop transitions, 37 changer transitions 0/209 dead transitions. [2024-06-27 18:42:19,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 209 transitions, 2085 flow [2024-06-27 18:42:19,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:42:19,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:42:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 18:42:19,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 18:42:19,964 INFO L175 Difference]: Start difference. First operand has 107 places, 149 transitions, 1391 flow. Second operand 7 states and 182 transitions. [2024-06-27 18:42:19,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 209 transitions, 2085 flow [2024-06-27 18:42:20,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 209 transitions, 2044 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 18:42:20,022 INFO L231 Difference]: Finished difference. Result has 111 places, 153 transitions, 1479 flow [2024-06-27 18:42:20,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1479, PETRI_PLACES=111, PETRI_TRANSITIONS=153} [2024-06-27 18:42:20,022 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 60 predicate places. [2024-06-27 18:42:20,022 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 153 transitions, 1479 flow [2024-06-27 18:42:20,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:20,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:20,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:20,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:42:20,023 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:20,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:20,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1563011897, now seen corresponding path program 2 times [2024-06-27 18:42:20,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:20,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773036599] [2024-06-27 18:42:20,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:20,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:22,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:22,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773036599] [2024-06-27 18:42:22,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773036599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:22,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:22,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:42:22,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876719080] [2024-06-27 18:42:22,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:22,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:42:22,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:22,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:42:22,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:42:22,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:42:22,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 153 transitions, 1479 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:22,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:22,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:42:22,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:24,277 INFO L124 PetriNetUnfolderBase]: 4653/7046 cut-off events. [2024-06-27 18:42:24,278 INFO L125 PetriNetUnfolderBase]: For 49823/49836 co-relation queries the response was YES. [2024-06-27 18:42:24,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31758 conditions, 7046 events. 4653/7046 cut-off events. For 49823/49836 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 40100 event pairs, 962 based on Foata normal form. 12/7055 useless extension candidates. Maximal degree in co-relation 31711. Up to 6233 conditions per place. [2024-06-27 18:42:24,328 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 163 selfloop transitions, 38 changer transitions 0/208 dead transitions. [2024-06-27 18:42:24,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 208 transitions, 2067 flow [2024-06-27 18:42:24,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:42:24,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:42:24,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 18:42:24,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547112462006079 [2024-06-27 18:42:24,330 INFO L175 Difference]: Start difference. First operand has 111 places, 153 transitions, 1479 flow. Second operand 7 states and 180 transitions. [2024-06-27 18:42:24,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 208 transitions, 2067 flow [2024-06-27 18:42:24,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 208 transitions, 2012 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 18:42:24,391 INFO L231 Difference]: Finished difference. Result has 115 places, 153 transitions, 1509 flow [2024-06-27 18:42:24,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1509, PETRI_PLACES=115, PETRI_TRANSITIONS=153} [2024-06-27 18:42:24,391 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 64 predicate places. [2024-06-27 18:42:24,392 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 153 transitions, 1509 flow [2024-06-27 18:42:24,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:24,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:24,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:24,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:42:24,392 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:24,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:24,393 INFO L85 PathProgramCache]: Analyzing trace with hash -437823044, now seen corresponding path program 1 times [2024-06-27 18:42:24,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:24,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006355216] [2024-06-27 18:42:24,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:24,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:24,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:27,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:27,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006355216] [2024-06-27 18:42:27,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006355216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:27,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:27,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:42:27,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553115258] [2024-06-27 18:42:27,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:27,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:42:27,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:27,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:42:27,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:42:27,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:42:27,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 153 transitions, 1509 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:27,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:27,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:42:27,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:28,919 INFO L124 PetriNetUnfolderBase]: 5033/7674 cut-off events. [2024-06-27 18:42:28,920 INFO L125 PetriNetUnfolderBase]: For 63830/63832 co-relation queries the response was YES. [2024-06-27 18:42:28,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35178 conditions, 7674 events. 5033/7674 cut-off events. For 63830/63832 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 44452 event pairs, 728 based on Foata normal form. 16/7684 useless extension candidates. Maximal degree in co-relation 35129. Up to 4597 conditions per place. [2024-06-27 18:42:28,982 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 144 selfloop transitions, 80 changer transitions 0/231 dead transitions. [2024-06-27 18:42:28,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 231 transitions, 2321 flow [2024-06-27 18:42:28,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:42:28,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:42:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-27 18:42:28,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797872340425532 [2024-06-27 18:42:28,983 INFO L175 Difference]: Start difference. First operand has 115 places, 153 transitions, 1509 flow. Second operand 8 states and 218 transitions. [2024-06-27 18:42:28,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 231 transitions, 2321 flow [2024-06-27 18:42:29,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 231 transitions, 2236 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 18:42:29,065 INFO L231 Difference]: Finished difference. Result has 117 places, 155 transitions, 1628 flow [2024-06-27 18:42:29,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1628, PETRI_PLACES=117, PETRI_TRANSITIONS=155} [2024-06-27 18:42:29,065 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 66 predicate places. [2024-06-27 18:42:29,066 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 155 transitions, 1628 flow [2024-06-27 18:42:29,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:29,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:29,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:29,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:42:29,066 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:29,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:29,067 INFO L85 PathProgramCache]: Analyzing trace with hash -349109414, now seen corresponding path program 2 times [2024-06-27 18:42:29,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:29,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307056273] [2024-06-27 18:42:29,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:29,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:31,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:31,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307056273] [2024-06-27 18:42:31,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307056273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:31,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:31,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:42:31,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400758566] [2024-06-27 18:42:31,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:31,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:42:31,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:31,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:42:31,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:42:32,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:42:32,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 155 transitions, 1628 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:32,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:32,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:42:32,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:34,295 INFO L124 PetriNetUnfolderBase]: 5309/8102 cut-off events. [2024-06-27 18:42:34,295 INFO L125 PetriNetUnfolderBase]: For 74741/74747 co-relation queries the response was YES. [2024-06-27 18:42:34,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38227 conditions, 8102 events. 5309/8102 cut-off events. For 74741/74747 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 47638 event pairs, 1056 based on Foata normal form. 28/8124 useless extension candidates. Maximal degree in co-relation 38177. Up to 5957 conditions per place. [2024-06-27 18:42:34,345 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 138 selfloop transitions, 85 changer transitions 0/230 dead transitions. [2024-06-27 18:42:34,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 230 transitions, 2356 flow [2024-06-27 18:42:34,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:42:34,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:42:34,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-27 18:42:34,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718085106382979 [2024-06-27 18:42:34,347 INFO L175 Difference]: Start difference. First operand has 117 places, 155 transitions, 1628 flow. Second operand 8 states and 215 transitions. [2024-06-27 18:42:34,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 230 transitions, 2356 flow [2024-06-27 18:42:34,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 230 transitions, 2260 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 18:42:34,435 INFO L231 Difference]: Finished difference. Result has 121 places, 157 transitions, 1746 flow [2024-06-27 18:42:34,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1534, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1746, PETRI_PLACES=121, PETRI_TRANSITIONS=157} [2024-06-27 18:42:34,436 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 70 predicate places. [2024-06-27 18:42:34,436 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 157 transitions, 1746 flow [2024-06-27 18:42:34,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:34,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:34,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:34,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:42:34,437 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:34,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:34,437 INFO L85 PathProgramCache]: Analyzing trace with hash -435949094, now seen corresponding path program 3 times [2024-06-27 18:42:34,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:34,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459257241] [2024-06-27 18:42:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:34,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:37,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:37,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459257241] [2024-06-27 18:42:37,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459257241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:37,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:37,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:42:37,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889049050] [2024-06-27 18:42:37,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:37,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:42:37,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:37,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:42:37,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:42:37,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:42:37,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 157 transitions, 1746 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:37,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:37,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:42:37,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:39,443 INFO L124 PetriNetUnfolderBase]: 5485/8392 cut-off events. [2024-06-27 18:42:39,443 INFO L125 PetriNetUnfolderBase]: For 79666/79668 co-relation queries the response was YES. [2024-06-27 18:42:39,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41011 conditions, 8392 events. 5485/8392 cut-off events. For 79666/79668 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 49740 event pairs, 1096 based on Foata normal form. 16/8402 useless extension candidates. Maximal degree in co-relation 40959. Up to 5929 conditions per place. [2024-06-27 18:42:39,502 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 140 selfloop transitions, 86 changer transitions 0/233 dead transitions. [2024-06-27 18:42:39,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 233 transitions, 2474 flow [2024-06-27 18:42:39,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:42:39,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:42:39,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-27 18:42:39,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797872340425532 [2024-06-27 18:42:39,522 INFO L175 Difference]: Start difference. First operand has 121 places, 157 transitions, 1746 flow. Second operand 8 states and 218 transitions. [2024-06-27 18:42:39,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 233 transitions, 2474 flow [2024-06-27 18:42:39,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 233 transitions, 2302 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 18:42:39,631 INFO L231 Difference]: Finished difference. Result has 123 places, 158 transitions, 1774 flow [2024-06-27 18:42:39,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1574, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1774, PETRI_PLACES=123, PETRI_TRANSITIONS=158} [2024-06-27 18:42:39,631 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 72 predicate places. [2024-06-27 18:42:39,631 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 158 transitions, 1774 flow [2024-06-27 18:42:39,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:39,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:39,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:39,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:42:39,632 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:39,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:39,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1864304940, now seen corresponding path program 4 times [2024-06-27 18:42:39,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:39,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678552185] [2024-06-27 18:42:39,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:39,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:42,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:42,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678552185] [2024-06-27 18:42:42,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678552185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:42,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:42,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:42:42,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361183682] [2024-06-27 18:42:42,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:42,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:42:42,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:42,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:42:42,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:42:42,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:42:42,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 158 transitions, 1774 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:42,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:42,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:42:42,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:44,802 INFO L124 PetriNetUnfolderBase]: 5807/8986 cut-off events. [2024-06-27 18:42:44,802 INFO L125 PetriNetUnfolderBase]: For 93197/93205 co-relation queries the response was YES. [2024-06-27 18:42:44,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44038 conditions, 8986 events. 5807/8986 cut-off events. For 93197/93205 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 54958 event pairs, 851 based on Foata normal form. 24/9004 useless extension candidates. Maximal degree in co-relation 43985. Up to 6213 conditions per place. [2024-06-27 18:42:44,868 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 146 selfloop transitions, 88 changer transitions 0/241 dead transitions. [2024-06-27 18:42:44,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 241 transitions, 2646 flow [2024-06-27 18:42:44,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:42:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:42:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-27 18:42:44,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-06-27 18:42:44,870 INFO L175 Difference]: Start difference. First operand has 123 places, 158 transitions, 1774 flow. Second operand 8 states and 224 transitions. [2024-06-27 18:42:44,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 241 transitions, 2646 flow [2024-06-27 18:42:45,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 241 transitions, 2468 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 18:42:45,006 INFO L231 Difference]: Finished difference. Result has 125 places, 160 transitions, 1824 flow [2024-06-27 18:42:45,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1596, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1824, PETRI_PLACES=125, PETRI_TRANSITIONS=160} [2024-06-27 18:42:45,007 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 74 predicate places. [2024-06-27 18:42:45,007 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 160 transitions, 1824 flow [2024-06-27 18:42:45,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:45,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:45,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:45,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:42:45,008 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:45,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:45,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1864301220, now seen corresponding path program 5 times [2024-06-27 18:42:45,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:45,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773588792] [2024-06-27 18:42:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:45,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:47,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:47,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773588792] [2024-06-27 18:42:47,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773588792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:47,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:47,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:42:47,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745861701] [2024-06-27 18:42:47,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:47,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:42:47,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:47,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:42:47,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:42:47,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:42:47,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 160 transitions, 1824 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:47,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:47,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:42:47,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:50,090 INFO L124 PetriNetUnfolderBase]: 6033/9332 cut-off events. [2024-06-27 18:42:50,090 INFO L125 PetriNetUnfolderBase]: For 101878/101886 co-relation queries the response was YES. [2024-06-27 18:42:50,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46021 conditions, 9332 events. 6033/9332 cut-off events. For 101878/101886 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 57421 event pairs, 1199 based on Foata normal form. 28/9354 useless extension candidates. Maximal degree in co-relation 45967. Up to 7175 conditions per place. [2024-06-27 18:42:50,160 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 147 selfloop transitions, 85 changer transitions 0/239 dead transitions. [2024-06-27 18:42:50,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 239 transitions, 2584 flow [2024-06-27 18:42:50,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:42:50,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:42:50,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-27 18:42:50,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5824468085106383 [2024-06-27 18:42:50,162 INFO L175 Difference]: Start difference. First operand has 125 places, 160 transitions, 1824 flow. Second operand 8 states and 219 transitions. [2024-06-27 18:42:50,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 239 transitions, 2584 flow [2024-06-27 18:42:50,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 239 transitions, 2473 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 18:42:50,329 INFO L231 Difference]: Finished difference. Result has 129 places, 161 transitions, 1918 flow [2024-06-27 18:42:50,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1713, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1918, PETRI_PLACES=129, PETRI_TRANSITIONS=161} [2024-06-27 18:42:50,333 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 78 predicate places. [2024-06-27 18:42:50,334 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 161 transitions, 1918 flow [2024-06-27 18:42:50,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:50,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:50,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:50,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:42:50,334 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:50,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:50,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1858794690, now seen corresponding path program 6 times [2024-06-27 18:42:50,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:50,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832035741] [2024-06-27 18:42:50,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:50,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:53,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:53,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832035741] [2024-06-27 18:42:53,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832035741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:53,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:53,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:42:53,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45858388] [2024-06-27 18:42:53,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:53,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:42:53,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:53,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:42:53,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:42:53,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:42:53,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 161 transitions, 1918 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:53,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:53,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:42:53,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:42:56,369 INFO L124 PetriNetUnfolderBase]: 6259/9632 cut-off events. [2024-06-27 18:42:56,369 INFO L125 PetriNetUnfolderBase]: For 109801/109807 co-relation queries the response was YES. [2024-06-27 18:42:56,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48951 conditions, 9632 events. 6259/9632 cut-off events. For 109801/109807 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 59247 event pairs, 1232 based on Foata normal form. 24/9650 useless extension candidates. Maximal degree in co-relation 48895. Up to 7521 conditions per place. [2024-06-27 18:42:56,443 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 158 selfloop transitions, 84 changer transitions 0/249 dead transitions. [2024-06-27 18:42:56,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 249 transitions, 2736 flow [2024-06-27 18:42:56,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:42:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:42:56,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-27 18:42:56,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2024-06-27 18:42:56,445 INFO L175 Difference]: Start difference. First operand has 129 places, 161 transitions, 1918 flow. Second operand 9 states and 240 transitions. [2024-06-27 18:42:56,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 249 transitions, 2736 flow [2024-06-27 18:42:56,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 249 transitions, 2563 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 18:42:56,635 INFO L231 Difference]: Finished difference. Result has 132 places, 162 transitions, 1950 flow [2024-06-27 18:42:56,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1745, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1950, PETRI_PLACES=132, PETRI_TRANSITIONS=162} [2024-06-27 18:42:56,636 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 81 predicate places. [2024-06-27 18:42:56,636 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 162 transitions, 1950 flow [2024-06-27 18:42:56,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:56,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:42:56,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:42:56,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:42:56,636 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:42:56,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:42:56,637 INFO L85 PathProgramCache]: Analyzing trace with hash -656990352, now seen corresponding path program 1 times [2024-06-27 18:42:56,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:42:56,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509027485] [2024-06-27 18:42:56,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:42:56,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:42:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:42:58,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:42:58,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:42:58,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509027485] [2024-06-27 18:42:58,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509027485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:42:58,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:42:58,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:42:58,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525365671] [2024-06-27 18:42:58,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:42:58,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:42:58,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:42:58,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:42:58,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:42:58,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:42:58,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 162 transitions, 1950 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:42:58,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:42:58,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:42:58,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:00,610 INFO L124 PetriNetUnfolderBase]: 5957/9287 cut-off events. [2024-06-27 18:43:00,611 INFO L125 PetriNetUnfolderBase]: For 109022/109049 co-relation queries the response was YES. [2024-06-27 18:43:00,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47398 conditions, 9287 events. 5957/9287 cut-off events. For 109022/109049 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 58774 event pairs, 1372 based on Foata normal form. 12/9225 useless extension candidates. Maximal degree in co-relation 47341. Up to 8509 conditions per place. [2024-06-27 18:43:00,683 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 170 selfloop transitions, 17 changer transitions 0/204 dead transitions. [2024-06-27 18:43:00,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 204 transitions, 2480 flow [2024-06-27 18:43:00,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:43:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:43:00,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 18:43:00,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390070921985816 [2024-06-27 18:43:00,684 INFO L175 Difference]: Start difference. First operand has 132 places, 162 transitions, 1950 flow. Second operand 6 states and 152 transitions. [2024-06-27 18:43:00,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 204 transitions, 2480 flow [2024-06-27 18:43:00,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 204 transitions, 2307 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 18:43:00,879 INFO L231 Difference]: Finished difference. Result has 131 places, 166 transitions, 1865 flow [2024-06-27 18:43:00,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1777, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1865, PETRI_PLACES=131, PETRI_TRANSITIONS=166} [2024-06-27 18:43:00,879 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 80 predicate places. [2024-06-27 18:43:00,879 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 166 transitions, 1865 flow [2024-06-27 18:43:00,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:00,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:00,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:00,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:43:00,880 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:00,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:00,880 INFO L85 PathProgramCache]: Analyzing trace with hash -670643472, now seen corresponding path program 7 times [2024-06-27 18:43:00,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:00,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757937641] [2024-06-27 18:43:00,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:00,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:00,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:03,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:03,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757937641] [2024-06-27 18:43:03,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757937641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:03,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:03,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:43:03,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238471693] [2024-06-27 18:43:03,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:03,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:43:03,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:03,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:43:03,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:43:03,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:43:03,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 166 transitions, 1865 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:03,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:03,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:43:03,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:06,664 INFO L124 PetriNetUnfolderBase]: 6531/10059 cut-off events. [2024-06-27 18:43:06,664 INFO L125 PetriNetUnfolderBase]: For 117698/117706 co-relation queries the response was YES. [2024-06-27 18:43:06,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50859 conditions, 10059 events. 6531/10059 cut-off events. For 117698/117706 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 62401 event pairs, 1185 based on Foata normal form. 26/10076 useless extension candidates. Maximal degree in co-relation 50801. Up to 7935 conditions per place. [2024-06-27 18:43:06,732 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 171 selfloop transitions, 88 changer transitions 0/266 dead transitions. [2024-06-27 18:43:06,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 266 transitions, 2795 flow [2024-06-27 18:43:06,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:43:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:43:06,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 263 transitions. [2024-06-27 18:43:06,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595744680851064 [2024-06-27 18:43:06,734 INFO L175 Difference]: Start difference. First operand has 131 places, 166 transitions, 1865 flow. Second operand 10 states and 263 transitions. [2024-06-27 18:43:06,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 266 transitions, 2795 flow [2024-06-27 18:43:06,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 266 transitions, 2718 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 18:43:06,932 INFO L231 Difference]: Finished difference. Result has 136 places, 167 transitions, 2003 flow [2024-06-27 18:43:06,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1788, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2003, PETRI_PLACES=136, PETRI_TRANSITIONS=167} [2024-06-27 18:43:06,936 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 85 predicate places. [2024-06-27 18:43:06,936 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 167 transitions, 2003 flow [2024-06-27 18:43:06,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:06,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:06,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:06,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:43:06,937 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:06,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:06,937 INFO L85 PathProgramCache]: Analyzing trace with hash 854355470, now seen corresponding path program 8 times [2024-06-27 18:43:06,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:06,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832963301] [2024-06-27 18:43:06,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:06,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:09,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:09,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832963301] [2024-06-27 18:43:09,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832963301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:09,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:09,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:43:09,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389357393] [2024-06-27 18:43:09,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:09,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:43:09,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:09,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:43:09,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:43:09,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:43:09,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 167 transitions, 2003 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:09,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:09,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:43:09,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:12,757 INFO L124 PetriNetUnfolderBase]: 6495/9947 cut-off events. [2024-06-27 18:43:12,757 INFO L125 PetriNetUnfolderBase]: For 121241/121245 co-relation queries the response was YES. [2024-06-27 18:43:12,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51467 conditions, 9947 events. 6495/9947 cut-off events. For 121241/121245 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 61039 event pairs, 1240 based on Foata normal form. 22/9952 useless extension candidates. Maximal degree in co-relation 51409. Up to 7879 conditions per place. [2024-06-27 18:43:12,840 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 159 selfloop transitions, 86 changer transitions 0/252 dead transitions. [2024-06-27 18:43:12,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 252 transitions, 2821 flow [2024-06-27 18:43:12,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:43:12,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:43:12,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-27 18:43:12,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5626477541371159 [2024-06-27 18:43:12,844 INFO L175 Difference]: Start difference. First operand has 136 places, 167 transitions, 2003 flow. Second operand 9 states and 238 transitions. [2024-06-27 18:43:12,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 252 transitions, 2821 flow [2024-06-27 18:43:13,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 252 transitions, 2634 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 18:43:13,129 INFO L231 Difference]: Finished difference. Result has 137 places, 167 transitions, 1997 flow [2024-06-27 18:43:13,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1816, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1997, PETRI_PLACES=137, PETRI_TRANSITIONS=167} [2024-06-27 18:43:13,130 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 86 predicate places. [2024-06-27 18:43:13,130 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 167 transitions, 1997 flow [2024-06-27 18:43:13,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:13,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:13,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:13,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:43:13,130 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:13,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:13,130 INFO L85 PathProgramCache]: Analyzing trace with hash -412608039, now seen corresponding path program 1 times [2024-06-27 18:43:13,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:13,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989768331] [2024-06-27 18:43:13,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:13,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:16,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:16,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989768331] [2024-06-27 18:43:16,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989768331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:16,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:16,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:43:16,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572405475] [2024-06-27 18:43:16,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:16,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:43:16,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:16,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:43:16,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:43:16,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:43:16,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 167 transitions, 1997 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:16,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:16,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:43:16,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:18,679 INFO L124 PetriNetUnfolderBase]: 6603/10106 cut-off events. [2024-06-27 18:43:18,680 INFO L125 PetriNetUnfolderBase]: For 116321/116329 co-relation queries the response was YES. [2024-06-27 18:43:18,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52092 conditions, 10106 events. 6603/10106 cut-off events. For 116321/116329 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 62006 event pairs, 1225 based on Foata normal form. 10/10097 useless extension candidates. Maximal degree in co-relation 52033. Up to 8267 conditions per place. [2024-06-27 18:43:18,761 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 153 selfloop transitions, 110 changer transitions 0/270 dead transitions. [2024-06-27 18:43:18,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 270 transitions, 3176 flow [2024-06-27 18:43:18,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:43:18,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:43:18,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-27 18:43:18,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5508274231678487 [2024-06-27 18:43:18,762 INFO L175 Difference]: Start difference. First operand has 137 places, 167 transitions, 1997 flow. Second operand 9 states and 233 transitions. [2024-06-27 18:43:18,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 270 transitions, 3176 flow [2024-06-27 18:43:18,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 270 transitions, 2932 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 18:43:18,952 INFO L231 Difference]: Finished difference. Result has 140 places, 191 transitions, 2392 flow [2024-06-27 18:43:18,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2392, PETRI_PLACES=140, PETRI_TRANSITIONS=191} [2024-06-27 18:43:18,952 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 89 predicate places. [2024-06-27 18:43:18,952 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 191 transitions, 2392 flow [2024-06-27 18:43:18,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:18,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:18,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:18,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:43:18,953 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:18,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:18,953 INFO L85 PathProgramCache]: Analyzing trace with hash -412281609, now seen corresponding path program 2 times [2024-06-27 18:43:18,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:18,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102439228] [2024-06-27 18:43:18,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:18,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:22,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:22,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102439228] [2024-06-27 18:43:22,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102439228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:22,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:22,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:43:22,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984514208] [2024-06-27 18:43:22,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:22,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:43:22,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:22,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:43:22,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:43:22,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:43:22,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 191 transitions, 2392 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:22,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:22,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:43:22,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:25,034 INFO L124 PetriNetUnfolderBase]: 6721/10312 cut-off events. [2024-06-27 18:43:25,035 INFO L125 PetriNetUnfolderBase]: For 116795/116803 co-relation queries the response was YES. [2024-06-27 18:43:25,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53913 conditions, 10312 events. 6721/10312 cut-off events. For 116795/116803 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 63764 event pairs, 1045 based on Foata normal form. 10/10303 useless extension candidates. Maximal degree in co-relation 53851. Up to 7921 conditions per place. [2024-06-27 18:43:25,139 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 157 selfloop transitions, 118 changer transitions 0/282 dead transitions. [2024-06-27 18:43:25,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 282 transitions, 3494 flow [2024-06-27 18:43:25,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:43:25,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:43:25,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 239 transitions. [2024-06-27 18:43:25,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5650118203309693 [2024-06-27 18:43:25,141 INFO L175 Difference]: Start difference. First operand has 140 places, 191 transitions, 2392 flow. Second operand 9 states and 239 transitions. [2024-06-27 18:43:25,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 282 transitions, 3494 flow [2024-06-27 18:43:25,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 282 transitions, 3311 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 18:43:25,414 INFO L231 Difference]: Finished difference. Result has 146 places, 198 transitions, 2613 flow [2024-06-27 18:43:25,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2211, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2613, PETRI_PLACES=146, PETRI_TRANSITIONS=198} [2024-06-27 18:43:25,414 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 95 predicate places. [2024-06-27 18:43:25,415 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 198 transitions, 2613 flow [2024-06-27 18:43:25,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:25,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:25,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:25,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:43:25,415 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:25,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:25,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1040633033, now seen corresponding path program 3 times [2024-06-27 18:43:25,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:25,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715376654] [2024-06-27 18:43:25,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:25,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:29,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:29,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715376654] [2024-06-27 18:43:29,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715376654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:29,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:29,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:43:29,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860517741] [2024-06-27 18:43:29,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:29,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:43:29,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:29,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:43:29,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:43:29,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:43:29,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 198 transitions, 2613 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:29,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:29,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:43:29,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:31,669 INFO L124 PetriNetUnfolderBase]: 6771/10385 cut-off events. [2024-06-27 18:43:31,670 INFO L125 PetriNetUnfolderBase]: For 127655/127663 co-relation queries the response was YES. [2024-06-27 18:43:31,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55310 conditions, 10385 events. 6771/10385 cut-off events. For 127655/127663 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 64314 event pairs, 1245 based on Foata normal form. 10/10374 useless extension candidates. Maximal degree in co-relation 55246. Up to 8527 conditions per place. [2024-06-27 18:43:31,760 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 161 selfloop transitions, 111 changer transitions 0/279 dead transitions. [2024-06-27 18:43:31,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 279 transitions, 3511 flow [2024-06-27 18:43:31,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:43:31,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:43:31,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-27 18:43:31,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5508274231678487 [2024-06-27 18:43:31,761 INFO L175 Difference]: Start difference. First operand has 146 places, 198 transitions, 2613 flow. Second operand 9 states and 233 transitions. [2024-06-27 18:43:31,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 279 transitions, 3511 flow [2024-06-27 18:43:32,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 279 transitions, 3253 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 18:43:32,063 INFO L231 Difference]: Finished difference. Result has 150 places, 201 transitions, 2660 flow [2024-06-27 18:43:32,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2363, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2660, PETRI_PLACES=150, PETRI_TRANSITIONS=201} [2024-06-27 18:43:32,064 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 99 predicate places. [2024-06-27 18:43:32,064 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 201 transitions, 2660 flow [2024-06-27 18:43:32,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:32,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:32,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:32,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 18:43:32,065 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:32,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:32,065 INFO L85 PathProgramCache]: Analyzing trace with hash 854570951, now seen corresponding path program 4 times [2024-06-27 18:43:32,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:32,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133996822] [2024-06-27 18:43:32,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:32,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:35,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:35,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133996822] [2024-06-27 18:43:35,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133996822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:35,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:35,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:43:35,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582014212] [2024-06-27 18:43:35,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:35,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:43:35,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:35,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:43:35,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:43:35,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:43:35,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 201 transitions, 2660 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:35,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:35,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:43:35,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:37,612 INFO L124 PetriNetUnfolderBase]: 6763/10378 cut-off events. [2024-06-27 18:43:37,612 INFO L125 PetriNetUnfolderBase]: For 131066/131070 co-relation queries the response was YES. [2024-06-27 18:43:37,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54953 conditions, 10378 events. 6763/10378 cut-off events. For 131066/131070 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 64290 event pairs, 1317 based on Foata normal form. 6/10367 useless extension candidates. Maximal degree in co-relation 54887. Up to 8515 conditions per place. [2024-06-27 18:43:37,704 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 163 selfloop transitions, 109 changer transitions 0/279 dead transitions. [2024-06-27 18:43:37,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 279 transitions, 3508 flow [2024-06-27 18:43:37,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:43:37,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:43:37,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-27 18:43:37,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5508274231678487 [2024-06-27 18:43:37,706 INFO L175 Difference]: Start difference. First operand has 150 places, 201 transitions, 2660 flow. Second operand 9 states and 233 transitions. [2024-06-27 18:43:37,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 279 transitions, 3508 flow [2024-06-27 18:43:37,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 279 transitions, 3260 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 18:43:37,995 INFO L231 Difference]: Finished difference. Result has 154 places, 202 transitions, 2655 flow [2024-06-27 18:43:37,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2412, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2655, PETRI_PLACES=154, PETRI_TRANSITIONS=202} [2024-06-27 18:43:37,995 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 103 predicate places. [2024-06-27 18:43:37,996 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 202 transitions, 2655 flow [2024-06-27 18:43:37,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:37,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:37,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:37,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 18:43:37,996 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:37,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:37,997 INFO L85 PathProgramCache]: Analyzing trace with hash -644610192, now seen corresponding path program 2 times [2024-06-27 18:43:37,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:37,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364941353] [2024-06-27 18:43:37,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:37,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:39,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:39,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364941353] [2024-06-27 18:43:39,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364941353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:39,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:39,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:43:39,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846386644] [2024-06-27 18:43:39,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:39,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:43:39,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:39,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:43:39,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:43:39,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:43:39,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 202 transitions, 2655 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:39,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:39,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:43:39,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:42,011 INFO L124 PetriNetUnfolderBase]: 6419/10066 cut-off events. [2024-06-27 18:43:42,011 INFO L125 PetriNetUnfolderBase]: For 133728/133802 co-relation queries the response was YES. [2024-06-27 18:43:42,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53117 conditions, 10066 events. 6419/10066 cut-off events. For 133728/133802 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 64971 event pairs, 1294 based on Foata normal form. 57/10050 useless extension candidates. Maximal degree in co-relation 53049. Up to 9133 conditions per place. [2024-06-27 18:43:42,103 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 201 selfloop transitions, 24 changer transitions 0/242 dead transitions. [2024-06-27 18:43:42,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 242 transitions, 3305 flow [2024-06-27 18:43:42,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:43:42,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:43:42,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 18:43:42,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212765957446809 [2024-06-27 18:43:42,105 INFO L175 Difference]: Start difference. First operand has 154 places, 202 transitions, 2655 flow. Second operand 6 states and 147 transitions. [2024-06-27 18:43:42,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 242 transitions, 3305 flow [2024-06-27 18:43:42,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 242 transitions, 3073 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 18:43:42,356 INFO L231 Difference]: Finished difference. Result has 155 places, 209 transitions, 2584 flow [2024-06-27 18:43:42,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2423, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2584, PETRI_PLACES=155, PETRI_TRANSITIONS=209} [2024-06-27 18:43:42,356 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 104 predicate places. [2024-06-27 18:43:42,357 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 209 transitions, 2584 flow [2024-06-27 18:43:42,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:42,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:42,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:42,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 18:43:42,357 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:42,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:42,358 INFO L85 PathProgramCache]: Analyzing trace with hash -651270480, now seen corresponding path program 1 times [2024-06-27 18:43:42,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:42,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891143273] [2024-06-27 18:43:42,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:42,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:43,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:43,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:43,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891143273] [2024-06-27 18:43:43,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891143273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:43,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:43,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:43:43,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545342715] [2024-06-27 18:43:43,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:43,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:43:43,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:43,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:43:43,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:43:43,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:43:43,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 209 transitions, 2584 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:43,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:43,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:43:43,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:45,983 INFO L124 PetriNetUnfolderBase]: 6803/10813 cut-off events. [2024-06-27 18:43:45,984 INFO L125 PetriNetUnfolderBase]: For 136318/136320 co-relation queries the response was YES. [2024-06-27 18:43:46,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55240 conditions, 10813 events. 6803/10813 cut-off events. For 136318/136320 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 70551 event pairs, 1840 based on Foata normal form. 2/10813 useless extension candidates. Maximal degree in co-relation 55170. Up to 9836 conditions per place. [2024-06-27 18:43:46,213 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 220 selfloop transitions, 21 changer transitions 0/248 dead transitions. [2024-06-27 18:43:46,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 248 transitions, 3308 flow [2024-06-27 18:43:46,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:43:46,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:43:46,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 18:43:46,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141843971631206 [2024-06-27 18:43:46,215 INFO L175 Difference]: Start difference. First operand has 155 places, 209 transitions, 2584 flow. Second operand 6 states and 145 transitions. [2024-06-27 18:43:46,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 248 transitions, 3308 flow [2024-06-27 18:43:46,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 248 transitions, 3250 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-27 18:43:46,501 INFO L231 Difference]: Finished difference. Result has 159 places, 217 transitions, 2679 flow [2024-06-27 18:43:46,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2526, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2679, PETRI_PLACES=159, PETRI_TRANSITIONS=217} [2024-06-27 18:43:46,502 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 108 predicate places. [2024-06-27 18:43:46,502 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 217 transitions, 2679 flow [2024-06-27 18:43:46,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:46,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:46,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:46,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 18:43:46,503 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:46,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:46,503 INFO L85 PathProgramCache]: Analyzing trace with hash 42674130, now seen corresponding path program 2 times [2024-06-27 18:43:46,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:46,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741246537] [2024-06-27 18:43:46,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:46,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:46,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:47,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:47,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741246537] [2024-06-27 18:43:47,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741246537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:47,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:47,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:43:47,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458113881] [2024-06-27 18:43:47,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:47,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:43:47,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:47,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:43:47,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:43:47,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:43:47,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 217 transitions, 2679 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:47,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:47,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:43:47,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:50,133 INFO L124 PetriNetUnfolderBase]: 6797/10806 cut-off events. [2024-06-27 18:43:50,133 INFO L125 PetriNetUnfolderBase]: For 142679/142690 co-relation queries the response was YES. [2024-06-27 18:43:50,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56111 conditions, 10806 events. 6797/10806 cut-off events. For 142679/142690 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 70494 event pairs, 1838 based on Foata normal form. 8/10811 useless extension candidates. Maximal degree in co-relation 56039. Up to 9831 conditions per place. [2024-06-27 18:43:50,233 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 214 selfloop transitions, 21 changer transitions 0/242 dead transitions. [2024-06-27 18:43:50,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 242 transitions, 3213 flow [2024-06-27 18:43:50,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:43:50,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:43:50,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 18:43:50,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4929078014184397 [2024-06-27 18:43:50,235 INFO L175 Difference]: Start difference. First operand has 159 places, 217 transitions, 2679 flow. Second operand 6 states and 139 transitions. [2024-06-27 18:43:50,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 242 transitions, 3213 flow [2024-06-27 18:43:50,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 242 transitions, 3133 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-27 18:43:50,613 INFO L231 Difference]: Finished difference. Result has 163 places, 217 transitions, 2648 flow [2024-06-27 18:43:50,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2599, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2648, PETRI_PLACES=163, PETRI_TRANSITIONS=217} [2024-06-27 18:43:50,614 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 112 predicate places. [2024-06-27 18:43:50,614 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 217 transitions, 2648 flow [2024-06-27 18:43:50,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:50,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:50,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:50,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 18:43:50,615 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:50,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:50,615 INFO L85 PathProgramCache]: Analyzing trace with hash 20339808, now seen corresponding path program 1 times [2024-06-27 18:43:50,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:50,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673131590] [2024-06-27 18:43:50,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:50,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:52,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:52,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673131590] [2024-06-27 18:43:52,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673131590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:52,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:52,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:43:52,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508697696] [2024-06-27 18:43:52,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:52,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:43:52,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:52,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:43:52,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:43:52,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:43:52,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 217 transitions, 2648 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:52,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:52,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:43:52,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:43:54,877 INFO L124 PetriNetUnfolderBase]: 6491/10344 cut-off events. [2024-06-27 18:43:54,877 INFO L125 PetriNetUnfolderBase]: For 146700/146819 co-relation queries the response was YES. [2024-06-27 18:43:54,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53926 conditions, 10344 events. 6491/10344 cut-off events. For 146700/146819 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 68147 event pairs, 1713 based on Foata normal form. 100/10373 useless extension candidates. Maximal degree in co-relation 53852. Up to 9268 conditions per place. [2024-06-27 18:43:54,964 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 213 selfloop transitions, 13 changer transitions 0/245 dead transitions. [2024-06-27 18:43:54,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 245 transitions, 3216 flow [2024-06-27 18:43:54,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:43:54,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:43:54,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 18:43:54,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:43:54,966 INFO L175 Difference]: Start difference. First operand has 163 places, 217 transitions, 2648 flow. Second operand 6 states and 141 transitions. [2024-06-27 18:43:54,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 245 transitions, 3216 flow [2024-06-27 18:43:55,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 245 transitions, 3159 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 18:43:55,244 INFO L231 Difference]: Finished difference. Result has 164 places, 220 transitions, 2681 flow [2024-06-27 18:43:55,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2591, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2681, PETRI_PLACES=164, PETRI_TRANSITIONS=220} [2024-06-27 18:43:55,245 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 113 predicate places. [2024-06-27 18:43:55,245 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 220 transitions, 2681 flow [2024-06-27 18:43:55,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:55,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:43:55,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:43:55,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 18:43:55,246 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:43:55,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:43:55,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1479023543, now seen corresponding path program 1 times [2024-06-27 18:43:55,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:43:55,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145270305] [2024-06-27 18:43:55,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:43:55,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:43:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:43:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:43:57,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:43:57,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145270305] [2024-06-27 18:43:57,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145270305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:43:57,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:43:57,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:43:57,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608729775] [2024-06-27 18:43:57,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:43:57,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:43:57,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:43:57,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:43:57,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:43:57,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:43:57,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 220 transitions, 2681 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:43:57,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:43:57,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:43:57,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:44:00,065 INFO L124 PetriNetUnfolderBase]: 7092/11072 cut-off events. [2024-06-27 18:44:00,065 INFO L125 PetriNetUnfolderBase]: For 160055/160084 co-relation queries the response was YES. [2024-06-27 18:44:00,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58768 conditions, 11072 events. 7092/11072 cut-off events. For 160055/160084 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 71362 event pairs, 1305 based on Foata normal form. 30/11099 useless extension candidates. Maximal degree in co-relation 58693. Up to 9624 conditions per place. [2024-06-27 18:44:00,162 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 244 selfloop transitions, 54 changer transitions 0/305 dead transitions. [2024-06-27 18:44:00,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 305 transitions, 3829 flow [2024-06-27 18:44:00,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:44:00,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:44:00,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-27 18:44:00,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5437352245862884 [2024-06-27 18:44:00,164 INFO L175 Difference]: Start difference. First operand has 164 places, 220 transitions, 2681 flow. Second operand 9 states and 230 transitions. [2024-06-27 18:44:00,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 305 transitions, 3829 flow [2024-06-27 18:44:00,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 305 transitions, 3761 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 18:44:00,533 INFO L231 Difference]: Finished difference. Result has 171 places, 235 transitions, 2954 flow [2024-06-27 18:44:00,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2613, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2954, PETRI_PLACES=171, PETRI_TRANSITIONS=235} [2024-06-27 18:44:00,533 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 120 predicate places. [2024-06-27 18:44:00,533 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 235 transitions, 2954 flow [2024-06-27 18:44:00,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:00,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:44:00,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:44:00,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 18:44:00,534 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:44:00,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:44:00,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1781378726, now seen corresponding path program 1 times [2024-06-27 18:44:00,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:44:00,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583230973] [2024-06-27 18:44:00,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:44:00,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:44:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:44:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:44:04,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:44:04,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583230973] [2024-06-27 18:44:04,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583230973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:44:04,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:44:04,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:44:04,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796075813] [2024-06-27 18:44:04,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:44:04,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:44:04,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:44:04,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:44:04,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:44:04,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:44:04,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 235 transitions, 2954 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:04,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:44:04,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:44:04,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:44:08,143 INFO L124 PetriNetUnfolderBase]: 7344/11401 cut-off events. [2024-06-27 18:44:08,143 INFO L125 PetriNetUnfolderBase]: For 188717/188723 co-relation queries the response was YES. [2024-06-27 18:44:08,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63682 conditions, 11401 events. 7344/11401 cut-off events. For 188717/188723 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 73076 event pairs, 1336 based on Foata normal form. 16/11411 useless extension candidates. Maximal degree in co-relation 63604. Up to 8636 conditions per place. [2024-06-27 18:44:08,247 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 248 selfloop transitions, 111 changer transitions 0/366 dead transitions. [2024-06-27 18:44:08,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 366 transitions, 4323 flow [2024-06-27 18:44:08,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:44:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:44:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 315 transitions. [2024-06-27 18:44:08,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2024-06-27 18:44:08,248 INFO L175 Difference]: Start difference. First operand has 171 places, 235 transitions, 2954 flow. Second operand 12 states and 315 transitions. [2024-06-27 18:44:08,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 366 transitions, 4323 flow [2024-06-27 18:44:08,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 366 transitions, 4188 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 18:44:08,706 INFO L231 Difference]: Finished difference. Result has 182 places, 243 transitions, 3197 flow [2024-06-27 18:44:08,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2819, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3197, PETRI_PLACES=182, PETRI_TRANSITIONS=243} [2024-06-27 18:44:08,708 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 131 predicate places. [2024-06-27 18:44:08,708 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 243 transitions, 3197 flow [2024-06-27 18:44:08,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:08,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:44:08,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:44:08,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 18:44:08,709 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:44:08,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:44:08,709 INFO L85 PathProgramCache]: Analyzing trace with hash -964755959, now seen corresponding path program 2 times [2024-06-27 18:44:08,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:44:08,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061975140] [2024-06-27 18:44:08,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:44:08,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:44:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:44:11,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:44:11,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:44:11,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061975140] [2024-06-27 18:44:11,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061975140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:44:11,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:44:11,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:44:11,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808071573] [2024-06-27 18:44:11,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:44:11,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:44:11,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:44:11,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:44:11,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:44:11,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:44:11,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 243 transitions, 3197 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:11,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:44:11,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:44:11,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:44:13,590 INFO L124 PetriNetUnfolderBase]: 7336/11476 cut-off events. [2024-06-27 18:44:13,590 INFO L125 PetriNetUnfolderBase]: For 193118/193139 co-relation queries the response was YES. [2024-06-27 18:44:13,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65472 conditions, 11476 events. 7336/11476 cut-off events. For 193118/193139 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 74628 event pairs, 1394 based on Foata normal form. 20/11493 useless extension candidates. Maximal degree in co-relation 65389. Up to 10017 conditions per place. [2024-06-27 18:44:13,697 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 234 selfloop transitions, 47 changer transitions 0/288 dead transitions. [2024-06-27 18:44:13,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 288 transitions, 3977 flow [2024-06-27 18:44:13,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:44:13,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:44:13,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 18:44:13,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349544072948328 [2024-06-27 18:44:13,699 INFO L175 Difference]: Start difference. First operand has 182 places, 243 transitions, 3197 flow. Second operand 7 states and 176 transitions. [2024-06-27 18:44:13,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 288 transitions, 3977 flow [2024-06-27 18:44:14,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 288 transitions, 3720 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 18:44:14,192 INFO L231 Difference]: Finished difference. Result has 182 places, 243 transitions, 3043 flow [2024-06-27 18:44:14,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2940, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3043, PETRI_PLACES=182, PETRI_TRANSITIONS=243} [2024-06-27 18:44:14,201 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 131 predicate places. [2024-06-27 18:44:14,202 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 243 transitions, 3043 flow [2024-06-27 18:44:14,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:14,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:44:14,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:44:14,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 18:44:14,202 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:44:14,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:44:14,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1984578346, now seen corresponding path program 2 times [2024-06-27 18:44:14,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:44:14,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009955392] [2024-06-27 18:44:14,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:44:14,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:44:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:44:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:44:17,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:44:17,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009955392] [2024-06-27 18:44:17,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009955392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:44:17,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:44:17,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:44:17,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127557847] [2024-06-27 18:44:17,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:44:17,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:44:17,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:44:17,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:44:17,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:44:17,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:44:17,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 243 transitions, 3043 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:17,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:44:17,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:44:17,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:44:21,429 INFO L124 PetriNetUnfolderBase]: 7696/12046 cut-off events. [2024-06-27 18:44:21,429 INFO L125 PetriNetUnfolderBase]: For 201514/201522 co-relation queries the response was YES. [2024-06-27 18:44:21,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67410 conditions, 12046 events. 7696/12046 cut-off events. For 201514/201522 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 78800 event pairs, 1369 based on Foata normal form. 18/12055 useless extension candidates. Maximal degree in co-relation 67326. Up to 9448 conditions per place. [2024-06-27 18:44:21,558 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 254 selfloop transitions, 124 changer transitions 0/385 dead transitions. [2024-06-27 18:44:21,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 385 transitions, 4550 flow [2024-06-27 18:44:21,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:44:21,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:44:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 339 transitions. [2024-06-27 18:44:21,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548281505728314 [2024-06-27 18:44:21,560 INFO L175 Difference]: Start difference. First operand has 182 places, 243 transitions, 3043 flow. Second operand 13 states and 339 transitions. [2024-06-27 18:44:21,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 385 transitions, 4550 flow [2024-06-27 18:44:22,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 385 transitions, 4456 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 18:44:22,037 INFO L231 Difference]: Finished difference. Result has 191 places, 252 transitions, 3356 flow [2024-06-27 18:44:22,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3356, PETRI_PLACES=191, PETRI_TRANSITIONS=252} [2024-06-27 18:44:22,038 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 140 predicate places. [2024-06-27 18:44:22,038 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 252 transitions, 3356 flow [2024-06-27 18:44:22,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:22,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:44:22,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:44:22,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 18:44:22,039 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:44:22,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:44:22,039 INFO L85 PathProgramCache]: Analyzing trace with hash 721897610, now seen corresponding path program 3 times [2024-06-27 18:44:22,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:44:22,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539757766] [2024-06-27 18:44:22,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:44:22,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:44:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:44:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:44:25,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:44:25,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539757766] [2024-06-27 18:44:25,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539757766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:44:25,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:44:25,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:44:25,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317473019] [2024-06-27 18:44:25,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:44:25,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:44:25,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:44:25,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:44:25,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:44:25,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:44:25,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 252 transitions, 3356 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:25,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:44:25,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:44:25,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:44:28,967 INFO L124 PetriNetUnfolderBase]: 7948/12448 cut-off events. [2024-06-27 18:44:28,967 INFO L125 PetriNetUnfolderBase]: For 223585/223589 co-relation queries the response was YES. [2024-06-27 18:44:29,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71634 conditions, 12448 events. 7948/12448 cut-off events. For 223585/223589 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 81603 event pairs, 1559 based on Foata normal form. 14/12447 useless extension candidates. Maximal degree in co-relation 71547. Up to 9844 conditions per place. [2024-06-27 18:44:29,110 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 244 selfloop transitions, 126 changer transitions 0/377 dead transitions. [2024-06-27 18:44:29,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 377 transitions, 4763 flow [2024-06-27 18:44:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:44:29,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:44:29,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 312 transitions. [2024-06-27 18:44:29,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 18:44:29,112 INFO L175 Difference]: Start difference. First operand has 191 places, 252 transitions, 3356 flow. Second operand 12 states and 312 transitions. [2024-06-27 18:44:29,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 377 transitions, 4763 flow [2024-06-27 18:44:29,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 377 transitions, 4500 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 18:44:29,680 INFO L231 Difference]: Finished difference. Result has 196 places, 259 transitions, 3487 flow [2024-06-27 18:44:29,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3101, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3487, PETRI_PLACES=196, PETRI_TRANSITIONS=259} [2024-06-27 18:44:29,680 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 145 predicate places. [2024-06-27 18:44:29,680 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 259 transitions, 3487 flow [2024-06-27 18:44:29,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:29,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:44:29,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:44:29,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 18:44:29,681 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:44:29,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:44:29,681 INFO L85 PathProgramCache]: Analyzing trace with hash 53151882, now seen corresponding path program 4 times [2024-06-27 18:44:29,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:44:29,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535388444] [2024-06-27 18:44:29,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:44:29,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:44:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:44:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:44:33,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:44:33,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535388444] [2024-06-27 18:44:33,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535388444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:44:33,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:44:33,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:44:33,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768015287] [2024-06-27 18:44:33,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:44:33,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:44:33,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:44:33,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:44:33,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:44:33,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:44:33,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 259 transitions, 3487 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:33,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:44:33,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:44:33,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:44:37,273 INFO L124 PetriNetUnfolderBase]: 8054/12676 cut-off events. [2024-06-27 18:44:37,273 INFO L125 PetriNetUnfolderBase]: For 220872/220880 co-relation queries the response was YES. [2024-06-27 18:44:37,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72531 conditions, 12676 events. 8054/12676 cut-off events. For 220872/220880 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 84013 event pairs, 1473 based on Foata normal form. 18/12685 useless extension candidates. Maximal degree in co-relation 72441. Up to 10010 conditions per place. [2024-06-27 18:44:37,402 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 255 selfloop transitions, 136 changer transitions 0/398 dead transitions. [2024-06-27 18:44:37,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 398 transitions, 4978 flow [2024-06-27 18:44:37,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:44:37,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:44:37,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 337 transitions. [2024-06-27 18:44:37,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5515548281505729 [2024-06-27 18:44:37,404 INFO L175 Difference]: Start difference. First operand has 196 places, 259 transitions, 3487 flow. Second operand 13 states and 337 transitions. [2024-06-27 18:44:37,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 398 transitions, 4978 flow [2024-06-27 18:44:38,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 398 transitions, 4707 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 18:44:38,013 INFO L231 Difference]: Finished difference. Result has 202 places, 264 transitions, 3586 flow [2024-06-27 18:44:38,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3224, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3586, PETRI_PLACES=202, PETRI_TRANSITIONS=264} [2024-06-27 18:44:38,014 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 151 predicate places. [2024-06-27 18:44:38,014 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 264 transitions, 3586 flow [2024-06-27 18:44:38,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:38,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:44:38,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:44:38,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 18:44:38,015 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:44:38,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:44:38,015 INFO L85 PathProgramCache]: Analyzing trace with hash 348371082, now seen corresponding path program 5 times [2024-06-27 18:44:38,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:44:38,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550339155] [2024-06-27 18:44:38,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:44:38,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:44:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:44:41,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:44:41,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:44:41,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550339155] [2024-06-27 18:44:41,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550339155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:44:41,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:44:41,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:44:41,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398958857] [2024-06-27 18:44:41,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:44:41,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:44:41,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:44:41,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:44:41,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:44:41,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:44:41,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 264 transitions, 3586 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:41,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:44:41,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:44:41,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:44:45,390 INFO L124 PetriNetUnfolderBase]: 8034/12608 cut-off events. [2024-06-27 18:44:45,390 INFO L125 PetriNetUnfolderBase]: For 214068/214076 co-relation queries the response was YES. [2024-06-27 18:44:45,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72067 conditions, 12608 events. 8034/12608 cut-off events. For 214068/214076 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 83078 event pairs, 1301 based on Foata normal form. 18/12617 useless extension candidates. Maximal degree in co-relation 71975. Up to 7962 conditions per place. [2024-06-27 18:44:45,548 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 229 selfloop transitions, 149 changer transitions 0/385 dead transitions. [2024-06-27 18:44:45,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 385 transitions, 4836 flow [2024-06-27 18:44:45,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:44:45,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:44:45,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 312 transitions. [2024-06-27 18:44:45,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 18:44:45,550 INFO L175 Difference]: Start difference. First operand has 202 places, 264 transitions, 3586 flow. Second operand 12 states and 312 transitions. [2024-06-27 18:44:45,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 385 transitions, 4836 flow [2024-06-27 18:44:46,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 385 transitions, 4430 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-27 18:44:46,143 INFO L231 Difference]: Finished difference. Result has 203 places, 263 transitions, 3412 flow [2024-06-27 18:44:46,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3110, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3412, PETRI_PLACES=203, PETRI_TRANSITIONS=263} [2024-06-27 18:44:46,143 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 152 predicate places. [2024-06-27 18:44:46,144 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 263 transitions, 3412 flow [2024-06-27 18:44:46,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:46,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:44:46,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:44:46,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 18:44:46,147 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:44:46,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:44:46,147 INFO L85 PathProgramCache]: Analyzing trace with hash 630073953, now seen corresponding path program 3 times [2024-06-27 18:44:46,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:44:46,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678230218] [2024-06-27 18:44:46,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:44:46,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:44:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:44:48,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:44:48,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:44:48,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678230218] [2024-06-27 18:44:48,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678230218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:44:48,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:44:48,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:44:48,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234594684] [2024-06-27 18:44:48,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:44:48,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:44:48,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:44:48,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:44:48,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:44:48,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:44:48,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 263 transitions, 3412 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:48,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:44:48,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:44:48,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:44:51,490 INFO L124 PetriNetUnfolderBase]: 8108/12803 cut-off events. [2024-06-27 18:44:51,490 INFO L125 PetriNetUnfolderBase]: For 208092/208131 co-relation queries the response was YES. [2024-06-27 18:44:51,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71004 conditions, 12803 events. 8108/12803 cut-off events. For 208092/208131 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 85447 event pairs, 1596 based on Foata normal form. 24/12813 useless extension candidates. Maximal degree in co-relation 70912. Up to 10832 conditions per place. [2024-06-27 18:44:51,649 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 252 selfloop transitions, 60 changer transitions 0/319 dead transitions. [2024-06-27 18:44:51,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 319 transitions, 4576 flow [2024-06-27 18:44:51,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:44:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:44:51,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 18:44:51,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227963525835866 [2024-06-27 18:44:51,650 INFO L175 Difference]: Start difference. First operand has 203 places, 263 transitions, 3412 flow. Second operand 7 states and 172 transitions. [2024-06-27 18:44:51,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 319 transitions, 4576 flow [2024-06-27 18:44:52,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 319 transitions, 4270 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-27 18:44:52,190 INFO L231 Difference]: Finished difference. Result has 202 places, 275 transitions, 3451 flow [2024-06-27 18:44:52,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3106, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3451, PETRI_PLACES=202, PETRI_TRANSITIONS=275} [2024-06-27 18:44:52,191 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 151 predicate places. [2024-06-27 18:44:52,192 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 275 transitions, 3451 flow [2024-06-27 18:44:52,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:52,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:44:52,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:44:52,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 18:44:52,192 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:44:52,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:44:52,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1004575833, now seen corresponding path program 1 times [2024-06-27 18:44:52,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:44:52,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593235658] [2024-06-27 18:44:52,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:44:52,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:44:52,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:44:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:44:53,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:44:53,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593235658] [2024-06-27 18:44:53,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593235658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:44:53,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:44:53,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:44:53,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666692254] [2024-06-27 18:44:53,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:44:53,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:44:53,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:44:53,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:44:53,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:44:53,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:44:53,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 275 transitions, 3451 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:53,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:44:53,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:44:53,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:44:56,885 INFO L124 PetriNetUnfolderBase]: 8144/13069 cut-off events. [2024-06-27 18:44:56,885 INFO L125 PetriNetUnfolderBase]: For 213826/213828 co-relation queries the response was YES. [2024-06-27 18:44:56,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71735 conditions, 13069 events. 8144/13069 cut-off events. For 213826/213828 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 89000 event pairs, 2143 based on Foata normal form. 2/13069 useless extension candidates. Maximal degree in co-relation 71640. Up to 11760 conditions per place. [2024-06-27 18:44:57,247 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 285 selfloop transitions, 32 changer transitions 0/324 dead transitions. [2024-06-27 18:44:57,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 324 transitions, 4423 flow [2024-06-27 18:44:57,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:44:57,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:44:57,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 18:44:57,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5167173252279635 [2024-06-27 18:44:57,249 INFO L175 Difference]: Start difference. First operand has 202 places, 275 transitions, 3451 flow. Second operand 7 states and 170 transitions. [2024-06-27 18:44:57,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 324 transitions, 4423 flow [2024-06-27 18:44:57,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 324 transitions, 4320 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-27 18:44:57,774 INFO L231 Difference]: Finished difference. Result has 206 places, 283 transitions, 3571 flow [2024-06-27 18:44:57,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3352, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3571, PETRI_PLACES=206, PETRI_TRANSITIONS=283} [2024-06-27 18:44:57,775 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 155 predicate places. [2024-06-27 18:44:57,775 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 283 transitions, 3571 flow [2024-06-27 18:44:57,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:57,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:44:57,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:44:57,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 18:44:57,776 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:44:57,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:44:57,776 INFO L85 PathProgramCache]: Analyzing trace with hash -741600263, now seen corresponding path program 2 times [2024-06-27 18:44:57,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:44:57,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150646949] [2024-06-27 18:44:57,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:44:57,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:44:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:44:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:44:59,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:44:59,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150646949] [2024-06-27 18:44:59,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150646949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:44:59,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:44:59,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:44:59,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66756248] [2024-06-27 18:44:59,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:44:59,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:44:59,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:44:59,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:44:59,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:44:59,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:44:59,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 283 transitions, 3571 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:44:59,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:44:59,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:44:59,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:02,429 INFO L124 PetriNetUnfolderBase]: 8180/13117 cut-off events. [2024-06-27 18:45:02,430 INFO L125 PetriNetUnfolderBase]: For 220638/220640 co-relation queries the response was YES. [2024-06-27 18:45:02,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72619 conditions, 13117 events. 8180/13117 cut-off events. For 220638/220640 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 89209 event pairs, 2143 based on Foata normal form. 2/13117 useless extension candidates. Maximal degree in co-relation 72523. Up to 11792 conditions per place. [2024-06-27 18:45:02,593 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 282 selfloop transitions, 35 changer transitions 0/324 dead transitions. [2024-06-27 18:45:02,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 324 transitions, 4467 flow [2024-06-27 18:45:02,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:45:02,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:45:02,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 18:45:02,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075987841945289 [2024-06-27 18:45:02,595 INFO L175 Difference]: Start difference. First operand has 206 places, 283 transitions, 3571 flow. Second operand 7 states and 167 transitions. [2024-06-27 18:45:02,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 324 transitions, 4467 flow [2024-06-27 18:45:03,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 324 transitions, 4326 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-27 18:45:03,185 INFO L231 Difference]: Finished difference. Result has 210 places, 287 transitions, 3585 flow [2024-06-27 18:45:03,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3458, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3585, PETRI_PLACES=210, PETRI_TRANSITIONS=287} [2024-06-27 18:45:03,185 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 159 predicate places. [2024-06-27 18:45:03,186 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 287 transitions, 3585 flow [2024-06-27 18:45:03,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:03,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:03,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:03,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 18:45:03,186 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:45:03,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:03,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1322899401, now seen corresponding path program 3 times [2024-06-27 18:45:03,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:03,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446714033] [2024-06-27 18:45:03,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:03,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:03,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:05,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:05,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446714033] [2024-06-27 18:45:05,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446714033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:05,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:05,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:45:05,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398571379] [2024-06-27 18:45:05,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:05,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:45:05,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:05,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:45:05,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:45:05,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:05,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 287 transitions, 3585 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:05,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:05,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:05,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:08,120 INFO L124 PetriNetUnfolderBase]: 8174/13119 cut-off events. [2024-06-27 18:45:08,120 INFO L125 PetriNetUnfolderBase]: For 223059/223064 co-relation queries the response was YES. [2024-06-27 18:45:08,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72403 conditions, 13119 events. 8174/13119 cut-off events. For 223059/223064 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 89320 event pairs, 2143 based on Foata normal form. 4/13119 useless extension candidates. Maximal degree in co-relation 72305. Up to 11787 conditions per place. [2024-06-27 18:45:08,255 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 276 selfloop transitions, 35 changer transitions 0/318 dead transitions. [2024-06-27 18:45:08,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 318 transitions, 4285 flow [2024-06-27 18:45:08,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:45:08,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:45:08,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 18:45:08,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2024-06-27 18:45:08,257 INFO L175 Difference]: Start difference. First operand has 210 places, 287 transitions, 3585 flow. Second operand 7 states and 161 transitions. [2024-06-27 18:45:08,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 318 transitions, 4285 flow [2024-06-27 18:45:08,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 318 transitions, 4176 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 18:45:08,910 INFO L231 Difference]: Finished difference. Result has 213 places, 287 transitions, 3553 flow [2024-06-27 18:45:08,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3476, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3553, PETRI_PLACES=213, PETRI_TRANSITIONS=287} [2024-06-27 18:45:08,911 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 162 predicate places. [2024-06-27 18:45:08,911 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 287 transitions, 3553 flow [2024-06-27 18:45:08,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:08,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:08,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:08,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 18:45:08,911 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:45:08,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:08,912 INFO L85 PathProgramCache]: Analyzing trace with hash -14160081, now seen corresponding path program 1 times [2024-06-27 18:45:08,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:08,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596352896] [2024-06-27 18:45:08,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:08,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:11,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:11,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596352896] [2024-06-27 18:45:11,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596352896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:11,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:11,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:45:11,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962896328] [2024-06-27 18:45:11,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:11,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:45:11,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:11,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:45:11,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:45:11,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:11,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 287 transitions, 3553 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:11,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:11,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:11,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:14,277 INFO L124 PetriNetUnfolderBase]: 8318/13058 cut-off events. [2024-06-27 18:45:14,277 INFO L125 PetriNetUnfolderBase]: For 230814/230827 co-relation queries the response was YES. [2024-06-27 18:45:14,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73440 conditions, 13058 events. 8318/13058 cut-off events. For 230814/230827 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 86628 event pairs, 1602 based on Foata normal form. 12/13067 useless extension candidates. Maximal degree in co-relation 73341. Up to 11384 conditions per place. [2024-06-27 18:45:14,402 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 293 selfloop transitions, 62 changer transitions 0/362 dead transitions. [2024-06-27 18:45:14,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 362 transitions, 4809 flow [2024-06-27 18:45:14,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:45:14,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:45:14,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-27 18:45:14,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 18:45:14,403 INFO L175 Difference]: Start difference. First operand has 213 places, 287 transitions, 3553 flow. Second operand 9 states and 225 transitions. [2024-06-27 18:45:14,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 362 transitions, 4809 flow [2024-06-27 18:45:15,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 362 transitions, 4705 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 18:45:15,088 INFO L231 Difference]: Finished difference. Result has 215 places, 296 transitions, 3717 flow [2024-06-27 18:45:15,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3449, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3717, PETRI_PLACES=215, PETRI_TRANSITIONS=296} [2024-06-27 18:45:15,088 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 164 predicate places. [2024-06-27 18:45:15,088 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 296 transitions, 3717 flow [2024-06-27 18:45:15,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:15,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:15,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:15,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 18:45:15,089 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:45:15,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:15,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1952931233, now seen corresponding path program 2 times [2024-06-27 18:45:15,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:15,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088281625] [2024-06-27 18:45:15,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:15,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:17,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:17,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088281625] [2024-06-27 18:45:17,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088281625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:17,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:17,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:45:17,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784440042] [2024-06-27 18:45:17,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:17,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:45:17,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:17,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:45:17,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:45:17,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:17,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 296 transitions, 3717 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:17,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:17,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:17,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:20,418 INFO L124 PetriNetUnfolderBase]: 8306/13075 cut-off events. [2024-06-27 18:45:20,419 INFO L125 PetriNetUnfolderBase]: For 234141/234162 co-relation queries the response was YES. [2024-06-27 18:45:20,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73929 conditions, 13075 events. 8306/13075 cut-off events. For 234141/234162 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 87148 event pairs, 1610 based on Foata normal form. 20/13092 useless extension candidates. Maximal degree in co-relation 73829. Up to 11376 conditions per place. [2024-06-27 18:45:20,550 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 279 selfloop transitions, 55 changer transitions 0/341 dead transitions. [2024-06-27 18:45:20,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 341 transitions, 4625 flow [2024-06-27 18:45:20,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:45:20,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:45:20,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 18:45:20,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 18:45:20,551 INFO L175 Difference]: Start difference. First operand has 215 places, 296 transitions, 3717 flow. Second operand 7 states and 175 transitions. [2024-06-27 18:45:20,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 341 transitions, 4625 flow [2024-06-27 18:45:21,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 341 transitions, 4473 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 18:45:21,186 INFO L231 Difference]: Finished difference. Result has 217 places, 296 transitions, 3685 flow [2024-06-27 18:45:21,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3565, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3685, PETRI_PLACES=217, PETRI_TRANSITIONS=296} [2024-06-27 18:45:21,187 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 166 predicate places. [2024-06-27 18:45:21,187 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 296 transitions, 3685 flow [2024-06-27 18:45:21,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:21,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:21,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:21,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 18:45:21,188 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:45:21,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:21,188 INFO L85 PathProgramCache]: Analyzing trace with hash -7484913, now seen corresponding path program 1 times [2024-06-27 18:45:21,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:21,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36523851] [2024-06-27 18:45:21,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:21,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:24,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:24,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36523851] [2024-06-27 18:45:24,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36523851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:24,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:24,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:45:24,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846275672] [2024-06-27 18:45:24,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:24,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:45:24,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:24,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:45:24,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:45:24,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:45:24,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 296 transitions, 3685 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:24,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:24,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:45:24,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:27,700 INFO L124 PetriNetUnfolderBase]: 7985/12663 cut-off events. [2024-06-27 18:45:27,700 INFO L125 PetriNetUnfolderBase]: For 238881/238975 co-relation queries the response was YES. [2024-06-27 18:45:27,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71600 conditions, 12663 events. 7985/12663 cut-off events. For 238881/238975 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 85558 event pairs, 1645 based on Foata normal form. 73/12649 useless extension candidates. Maximal degree in co-relation 71499. Up to 11320 conditions per place. [2024-06-27 18:45:27,823 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 297 selfloop transitions, 20 changer transitions 0/344 dead transitions. [2024-06-27 18:45:27,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 344 transitions, 4533 flow [2024-06-27 18:45:27,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:45:27,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:45:27,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 18:45:27,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5258358662613982 [2024-06-27 18:45:27,825 INFO L175 Difference]: Start difference. First operand has 217 places, 296 transitions, 3685 flow. Second operand 7 states and 173 transitions. [2024-06-27 18:45:27,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 344 transitions, 4533 flow [2024-06-27 18:45:28,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 344 transitions, 4423 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 18:45:28,487 INFO L231 Difference]: Finished difference. Result has 218 places, 299 transitions, 3693 flow [2024-06-27 18:45:28,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3575, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3693, PETRI_PLACES=218, PETRI_TRANSITIONS=299} [2024-06-27 18:45:28,488 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 167 predicate places. [2024-06-27 18:45:28,488 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 299 transitions, 3693 flow [2024-06-27 18:45:28,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:28,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:28,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:28,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 18:45:28,489 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:45:28,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:28,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1181949743, now seen corresponding path program 3 times [2024-06-27 18:45:28,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:28,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586271666] [2024-06-27 18:45:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:28,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:28,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:30,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:30,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586271666] [2024-06-27 18:45:30,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586271666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:30,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:30,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:45:30,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010674084] [2024-06-27 18:45:30,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:30,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:45:30,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:30,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:45:30,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:45:30,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:30,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 299 transitions, 3693 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:30,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:30,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:30,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:33,653 INFO L124 PetriNetUnfolderBase]: 8334/13133 cut-off events. [2024-06-27 18:45:33,653 INFO L125 PetriNetUnfolderBase]: For 244493/244499 co-relation queries the response was YES. [2024-06-27 18:45:33,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74261 conditions, 13133 events. 8334/13133 cut-off events. For 244493/244499 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 87450 event pairs, 1659 based on Foata normal form. 6/13130 useless extension candidates. Maximal degree in co-relation 74159. Up to 11810 conditions per place. [2024-06-27 18:45:33,824 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 300 selfloop transitions, 41 changer transitions 0/348 dead transitions. [2024-06-27 18:45:33,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 348 transitions, 4597 flow [2024-06-27 18:45:33,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:45:33,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:45:33,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 18:45:33,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227963525835866 [2024-06-27 18:45:33,826 INFO L175 Difference]: Start difference. First operand has 218 places, 299 transitions, 3693 flow. Second operand 7 states and 172 transitions. [2024-06-27 18:45:33,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 348 transitions, 4597 flow [2024-06-27 18:45:34,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 348 transitions, 4477 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-27 18:45:34,690 INFO L231 Difference]: Finished difference. Result has 220 places, 299 transitions, 3663 flow [2024-06-27 18:45:34,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3573, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3663, PETRI_PLACES=220, PETRI_TRANSITIONS=299} [2024-06-27 18:45:34,691 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 169 predicate places. [2024-06-27 18:45:34,691 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 299 transitions, 3663 flow [2024-06-27 18:45:34,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:34,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:34,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:34,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 18:45:34,691 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:45:34,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:34,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1194329903, now seen corresponding path program 4 times [2024-06-27 18:45:34,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:34,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674134254] [2024-06-27 18:45:34,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:34,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:36,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:36,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674134254] [2024-06-27 18:45:36,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674134254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:36,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:36,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:45:36,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703909585] [2024-06-27 18:45:36,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:36,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:45:36,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:36,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:45:36,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:45:37,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:37,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 299 transitions, 3663 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:37,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:37,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:37,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:40,099 INFO L124 PetriNetUnfolderBase]: 8420/13214 cut-off events. [2024-06-27 18:45:40,099 INFO L125 PetriNetUnfolderBase]: For 250222/250230 co-relation queries the response was YES. [2024-06-27 18:45:40,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75057 conditions, 13214 events. 8420/13214 cut-off events. For 250222/250230 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 87514 event pairs, 1636 based on Foata normal form. 8/13213 useless extension candidates. Maximal degree in co-relation 74954. Up to 11105 conditions per place. [2024-06-27 18:45:40,231 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 268 selfloop transitions, 85 changer transitions 0/360 dead transitions. [2024-06-27 18:45:40,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 360 transitions, 4875 flow [2024-06-27 18:45:40,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:45:40,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:45:40,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 18:45:40,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349544072948328 [2024-06-27 18:45:40,233 INFO L175 Difference]: Start difference. First operand has 220 places, 299 transitions, 3663 flow. Second operand 7 states and 176 transitions. [2024-06-27 18:45:40,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 360 transitions, 4875 flow [2024-06-27 18:45:40,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 360 transitions, 4729 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 18:45:40,917 INFO L231 Difference]: Finished difference. Result has 222 places, 312 transitions, 3960 flow [2024-06-27 18:45:40,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3960, PETRI_PLACES=222, PETRI_TRANSITIONS=312} [2024-06-27 18:45:40,918 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 171 predicate places. [2024-06-27 18:45:40,918 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 312 transitions, 3960 flow [2024-06-27 18:45:40,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:40,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:40,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:40,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 18:45:40,919 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:45:40,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:40,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1469009743, now seen corresponding path program 5 times [2024-06-27 18:45:40,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:40,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546762215] [2024-06-27 18:45:40,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:40,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:43,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:43,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546762215] [2024-06-27 18:45:43,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546762215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:43,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:43,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:45:43,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393731082] [2024-06-27 18:45:43,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:43,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:45:43,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:43,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:45:43,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:45:43,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:43,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 312 transitions, 3960 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:43,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:43,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:43,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:46,357 INFO L124 PetriNetUnfolderBase]: 8460/13299 cut-off events. [2024-06-27 18:45:46,357 INFO L125 PetriNetUnfolderBase]: For 263130/263169 co-relation queries the response was YES. [2024-06-27 18:45:46,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76894 conditions, 13299 events. 8460/13299 cut-off events. For 263130/263169 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 88437 event pairs, 1619 based on Foata normal form. 24/13309 useless extension candidates. Maximal degree in co-relation 76788. Up to 11124 conditions per place. [2024-06-27 18:45:46,516 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 273 selfloop transitions, 76 changer transitions 0/356 dead transitions. [2024-06-27 18:45:46,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 356 transitions, 4995 flow [2024-06-27 18:45:46,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:45:46,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:45:46,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 18:45:46,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5197568389057751 [2024-06-27 18:45:46,517 INFO L175 Difference]: Start difference. First operand has 222 places, 312 transitions, 3960 flow. Second operand 7 states and 171 transitions. [2024-06-27 18:45:46,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 356 transitions, 4995 flow [2024-06-27 18:45:47,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 356 transitions, 4927 flow, removed 33 selfloop flow, removed 1 redundant places. [2024-06-27 18:45:47,306 INFO L231 Difference]: Finished difference. Result has 228 places, 315 transitions, 4103 flow [2024-06-27 18:45:47,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3896, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4103, PETRI_PLACES=228, PETRI_TRANSITIONS=315} [2024-06-27 18:45:47,307 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 177 predicate places. [2024-06-27 18:45:47,307 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 315 transitions, 4103 flow [2024-06-27 18:45:47,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:47,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:47,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:47,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 18:45:47,308 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:45:47,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:47,308 INFO L85 PathProgramCache]: Analyzing trace with hash -989348049, now seen corresponding path program 6 times [2024-06-27 18:45:47,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:47,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741337504] [2024-06-27 18:45:47,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:47,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:49,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:49,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741337504] [2024-06-27 18:45:49,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741337504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:49,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:49,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:45:49,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351737502] [2024-06-27 18:45:49,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:49,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:45:49,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:49,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:45:49,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:45:49,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:49,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 315 transitions, 4103 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:49,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:49,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:49,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:52,360 INFO L124 PetriNetUnfolderBase]: 8450/13283 cut-off events. [2024-06-27 18:45:52,361 INFO L125 PetriNetUnfolderBase]: For 265335/265374 co-relation queries the response was YES. [2024-06-27 18:45:52,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77477 conditions, 13283 events. 8450/13283 cut-off events. For 265335/265374 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 88279 event pairs, 1623 based on Foata normal form. 22/13291 useless extension candidates. Maximal degree in co-relation 77368. Up to 11116 conditions per place. [2024-06-27 18:45:52,497 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 268 selfloop transitions, 81 changer transitions 0/356 dead transitions. [2024-06-27 18:45:52,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 356 transitions, 5011 flow [2024-06-27 18:45:52,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:45:52,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:45:52,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 18:45:52,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.513677811550152 [2024-06-27 18:45:52,499 INFO L175 Difference]: Start difference. First operand has 228 places, 315 transitions, 4103 flow. Second operand 7 states and 169 transitions. [2024-06-27 18:45:52,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 356 transitions, 5011 flow [2024-06-27 18:45:53,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 356 transitions, 4852 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 18:45:53,363 INFO L231 Difference]: Finished difference. Result has 231 places, 315 transitions, 4113 flow [2024-06-27 18:45:53,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3944, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4113, PETRI_PLACES=231, PETRI_TRANSITIONS=315} [2024-06-27 18:45:53,364 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 180 predicate places. [2024-06-27 18:45:53,364 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 315 transitions, 4113 flow [2024-06-27 18:45:53,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:53,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:53,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:53,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 18:45:53,365 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:45:53,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:53,365 INFO L85 PathProgramCache]: Analyzing trace with hash -995053041, now seen corresponding path program 2 times [2024-06-27 18:45:53,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:53,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133988339] [2024-06-27 18:45:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:53,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:56,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:56,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:56,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133988339] [2024-06-27 18:45:56,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133988339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:56,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:56,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:45:56,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760963702] [2024-06-27 18:45:56,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:56,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:45:56,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:56,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:45:56,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:45:56,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:45:56,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 315 transitions, 4113 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:45:56,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:56,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:45:56,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:59,355 INFO L124 PetriNetUnfolderBase]: 8119/12895 cut-off events. [2024-06-27 18:45:59,355 INFO L125 PetriNetUnfolderBase]: For 270922/271021 co-relation queries the response was YES. [2024-06-27 18:45:59,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75204 conditions, 12895 events. 8119/12895 cut-off events. For 270922/271021 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 87390 event pairs, 1615 based on Foata normal form. 76/12885 useless extension candidates. Maximal degree in co-relation 75094. Up to 11404 conditions per place. [2024-06-27 18:45:59,514 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 301 selfloop transitions, 26 changer transitions 0/358 dead transitions. [2024-06-27 18:45:59,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 358 transitions, 5001 flow [2024-06-27 18:45:59,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:45:59,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:45:59,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 18:45:59,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-27 18:45:59,515 INFO L175 Difference]: Start difference. First operand has 231 places, 315 transitions, 4113 flow. Second operand 7 states and 168 transitions. [2024-06-27 18:45:59,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 358 transitions, 5001 flow [2024-06-27 18:46:00,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 358 transitions, 4790 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 18:46:00,548 INFO L231 Difference]: Finished difference. Result has 230 places, 317 transitions, 4009 flow [2024-06-27 18:46:00,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3902, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4009, PETRI_PLACES=230, PETRI_TRANSITIONS=317} [2024-06-27 18:46:00,548 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 179 predicate places. [2024-06-27 18:46:00,548 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 317 transitions, 4009 flow [2024-06-27 18:46:00,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:00,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:00,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:00,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 18:46:00,549 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:46:00,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:00,550 INFO L85 PathProgramCache]: Analyzing trace with hash 337018707, now seen corresponding path program 3 times [2024-06-27 18:46:00,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:00,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979175731] [2024-06-27 18:46:00,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:00,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:46:03,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:03,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979175731] [2024-06-27 18:46:03,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979175731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:03,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:03,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:03,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383184584] [2024-06-27 18:46:03,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:03,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:03,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:03,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:03,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:03,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:46:03,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 317 transitions, 4009 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:03,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:03,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:46:03,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:06,592 INFO L124 PetriNetUnfolderBase]: 8122/12904 cut-off events. [2024-06-27 18:46:06,593 INFO L125 PetriNetUnfolderBase]: For 274342/274441 co-relation queries the response was YES. [2024-06-27 18:46:06,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74592 conditions, 12904 events. 8122/12904 cut-off events. For 274342/274441 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 87530 event pairs, 1616 based on Foata normal form. 76/12894 useless extension candidates. Maximal degree in co-relation 74483. Up to 11305 conditions per place. [2024-06-27 18:46:06,750 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 300 selfloop transitions, 33 changer transitions 0/364 dead transitions. [2024-06-27 18:46:06,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 364 transitions, 5015 flow [2024-06-27 18:46:06,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:46:06,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:46:06,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 18:46:06,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-27 18:46:06,751 INFO L175 Difference]: Start difference. First operand has 230 places, 317 transitions, 4009 flow. Second operand 7 states and 168 transitions. [2024-06-27 18:46:06,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 364 transitions, 5015 flow [2024-06-27 18:46:07,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 364 transitions, 4940 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 18:46:07,633 INFO L231 Difference]: Finished difference. Result has 233 places, 322 transitions, 4149 flow [2024-06-27 18:46:07,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3934, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4149, PETRI_PLACES=233, PETRI_TRANSITIONS=322} [2024-06-27 18:46:07,633 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 182 predicate places. [2024-06-27 18:46:07,633 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 322 transitions, 4149 flow [2024-06-27 18:46:07,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:07,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:07,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:07,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 18:46:07,634 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:46:07,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:07,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1514947901, now seen corresponding path program 1 times [2024-06-27 18:46:07,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:07,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257004414] [2024-06-27 18:46:07,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:07,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:46:09,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:09,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257004414] [2024-06-27 18:46:09,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257004414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:09,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:09,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:09,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876039720] [2024-06-27 18:46:09,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:09,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:09,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:09,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:09,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:10,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:10,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 322 transitions, 4149 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:10,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:10,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:10,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:13,212 INFO L124 PetriNetUnfolderBase]: 8527/13656 cut-off events. [2024-06-27 18:46:13,212 INFO L125 PetriNetUnfolderBase]: For 285085/285087 co-relation queries the response was YES. [2024-06-27 18:46:13,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78429 conditions, 13656 events. 8527/13656 cut-off events. For 285085/285087 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 93250 event pairs, 2241 based on Foata normal form. 2/13656 useless extension candidates. Maximal degree in co-relation 78318. Up to 12379 conditions per place. [2024-06-27 18:46:13,631 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 343 selfloop transitions, 22 changer transitions 0/372 dead transitions. [2024-06-27 18:46:13,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 372 transitions, 5077 flow [2024-06-27 18:46:13,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:46:13,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:46:13,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 18:46:13,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973404255319149 [2024-06-27 18:46:13,633 INFO L175 Difference]: Start difference. First operand has 233 places, 322 transitions, 4149 flow. Second operand 8 states and 187 transitions. [2024-06-27 18:46:13,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 372 transitions, 5077 flow [2024-06-27 18:46:14,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 372 transitions, 4986 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 18:46:14,521 INFO L231 Difference]: Finished difference. Result has 238 places, 326 transitions, 4193 flow [2024-06-27 18:46:14,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4058, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4193, PETRI_PLACES=238, PETRI_TRANSITIONS=326} [2024-06-27 18:46:14,521 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 187 predicate places. [2024-06-27 18:46:14,521 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 326 transitions, 4193 flow [2024-06-27 18:46:14,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:14,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:14,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:14,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 18:46:14,522 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:46:14,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:14,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1217414243, now seen corresponding path program 2 times [2024-06-27 18:46:14,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:14,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724004974] [2024-06-27 18:46:14,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:14,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:16,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:46:16,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:16,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724004974] [2024-06-27 18:46:16,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724004974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:16,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:16,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:16,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845352344] [2024-06-27 18:46:16,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:16,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:16,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:16,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:16,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:16,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:16,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 326 transitions, 4193 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:16,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:16,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:16,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:20,404 INFO L124 PetriNetUnfolderBase]: 8563/13701 cut-off events. [2024-06-27 18:46:20,404 INFO L125 PetriNetUnfolderBase]: For 295406/295408 co-relation queries the response was YES. [2024-06-27 18:46:20,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79893 conditions, 13701 events. 8563/13701 cut-off events. For 295406/295408 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 93437 event pairs, 2174 based on Foata normal form. 2/13701 useless extension candidates. Maximal degree in co-relation 79780. Up to 12206 conditions per place. [2024-06-27 18:46:20,569 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 325 selfloop transitions, 49 changer transitions 0/381 dead transitions. [2024-06-27 18:46:20,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 381 transitions, 5343 flow [2024-06-27 18:46:20,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:46:20,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:46:20,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 18:46:20,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132978723404256 [2024-06-27 18:46:20,571 INFO L175 Difference]: Start difference. First operand has 238 places, 326 transitions, 4193 flow. Second operand 8 states and 193 transitions. [2024-06-27 18:46:20,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 381 transitions, 5343 flow [2024-06-27 18:46:21,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 381 transitions, 5236 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 18:46:21,499 INFO L231 Difference]: Finished difference. Result has 240 places, 334 transitions, 4367 flow [2024-06-27 18:46:21,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4086, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4367, PETRI_PLACES=240, PETRI_TRANSITIONS=334} [2024-06-27 18:46:21,500 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 189 predicate places. [2024-06-27 18:46:21,500 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 334 transitions, 4367 flow [2024-06-27 18:46:21,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:21,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:21,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:21,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 18:46:21,501 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:46:21,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:21,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1194344783, now seen corresponding path program 1 times [2024-06-27 18:46:21,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:21,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752267247] [2024-06-27 18:46:21,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:21,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:46:24,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:24,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752267247] [2024-06-27 18:46:24,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752267247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:24,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:24,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:24,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970878812] [2024-06-27 18:46:24,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:24,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:24,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:24,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:24,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:24,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:24,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 334 transitions, 4367 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:24,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:24,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:24,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:27,301 INFO L124 PetriNetUnfolderBase]: 8593/13751 cut-off events. [2024-06-27 18:46:27,302 INFO L125 PetriNetUnfolderBase]: For 310535/310537 co-relation queries the response was YES. [2024-06-27 18:46:27,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81517 conditions, 13751 events. 8593/13751 cut-off events. For 310535/310537 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 93819 event pairs, 2189 based on Foata normal form. 2/13751 useless extension candidates. Maximal degree in co-relation 81403. Up to 12435 conditions per place. [2024-06-27 18:46:27,515 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 342 selfloop transitions, 24 changer transitions 0/373 dead transitions. [2024-06-27 18:46:27,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 373 transitions, 5267 flow [2024-06-27 18:46:27,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:46:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:46:27,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 18:46:27,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49544072948328266 [2024-06-27 18:46:27,516 INFO L175 Difference]: Start difference. First operand has 240 places, 334 transitions, 4367 flow. Second operand 7 states and 163 transitions. [2024-06-27 18:46:27,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 373 transitions, 5267 flow [2024-06-27 18:46:28,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 373 transitions, 5134 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-27 18:46:28,683 INFO L231 Difference]: Finished difference. Result has 243 places, 337 transitions, 4370 flow [2024-06-27 18:46:28,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4234, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4370, PETRI_PLACES=243, PETRI_TRANSITIONS=337} [2024-06-27 18:46:28,684 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 192 predicate places. [2024-06-27 18:46:28,684 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 337 transitions, 4370 flow [2024-06-27 18:46:28,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:28,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:28,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:28,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 18:46:28,685 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:46:28,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:28,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1194337839, now seen corresponding path program 3 times [2024-06-27 18:46:28,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:28,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302341693] [2024-06-27 18:46:28,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:28,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:46:31,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:31,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302341693] [2024-06-27 18:46:31,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302341693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:31,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:31,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:31,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897320955] [2024-06-27 18:46:31,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:31,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:31,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:31,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:31,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:31,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:31,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 337 transitions, 4370 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:31,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:31,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:31,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:34,618 INFO L124 PetriNetUnfolderBase]: 8629/13803 cut-off events. [2024-06-27 18:46:34,618 INFO L125 PetriNetUnfolderBase]: For 322180/322182 co-relation queries the response was YES. [2024-06-27 18:46:34,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82313 conditions, 13803 events. 8629/13803 cut-off events. For 322180/322182 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 94210 event pairs, 2180 based on Foata normal form. 2/13803 useless extension candidates. Maximal degree in co-relation 82197. Up to 12280 conditions per place. [2024-06-27 18:46:34,774 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 325 selfloop transitions, 52 changer transitions 0/384 dead transitions. [2024-06-27 18:46:34,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 384 transitions, 5418 flow [2024-06-27 18:46:34,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:46:34,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:46:34,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 18:46:34,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053191489361702 [2024-06-27 18:46:34,776 INFO L175 Difference]: Start difference. First operand has 243 places, 337 transitions, 4370 flow. Second operand 8 states and 190 transitions. [2024-06-27 18:46:34,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 384 transitions, 5418 flow [2024-06-27 18:46:35,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 384 transitions, 5304 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 18:46:35,880 INFO L231 Difference]: Finished difference. Result has 246 places, 341 transitions, 4435 flow [2024-06-27 18:46:35,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4256, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4435, PETRI_PLACES=246, PETRI_TRANSITIONS=341} [2024-06-27 18:46:35,882 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 195 predicate places. [2024-06-27 18:46:35,882 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 341 transitions, 4435 flow [2024-06-27 18:46:35,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:35,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:35,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:35,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 18:46:35,882 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:46:35,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:35,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1468556833, now seen corresponding path program 2 times [2024-06-27 18:46:35,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:35,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203018412] [2024-06-27 18:46:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:35,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:46:38,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:38,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203018412] [2024-06-27 18:46:38,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203018412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:38,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:38,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:38,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994012362] [2024-06-27 18:46:38,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:38,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:38,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:38,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:38,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:38,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:38,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 341 transitions, 4435 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:38,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:38,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:38,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:41,400 INFO L124 PetriNetUnfolderBase]: 8659/13858 cut-off events. [2024-06-27 18:46:41,400 INFO L125 PetriNetUnfolderBase]: For 329155/329166 co-relation queries the response was YES. [2024-06-27 18:46:41,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82780 conditions, 13858 events. 8659/13858 cut-off events. For 329155/329166 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 94656 event pairs, 2176 based on Foata normal form. 8/13863 useless extension candidates. Maximal degree in co-relation 82663. Up to 12525 conditions per place. [2024-06-27 18:46:41,582 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 344 selfloop transitions, 24 changer transitions 0/375 dead transitions. [2024-06-27 18:46:41,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 375 transitions, 5331 flow [2024-06-27 18:46:41,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:46:41,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:46:41,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-27 18:46:41,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48024316109422494 [2024-06-27 18:46:41,583 INFO L175 Difference]: Start difference. First operand has 246 places, 341 transitions, 4435 flow. Second operand 7 states and 158 transitions. [2024-06-27 18:46:41,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 375 transitions, 5331 flow [2024-06-27 18:46:42,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 375 transitions, 5202 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 18:46:42,715 INFO L231 Difference]: Finished difference. Result has 248 places, 344 transitions, 4448 flow [2024-06-27 18:46:42,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4306, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4448, PETRI_PLACES=248, PETRI_TRANSITIONS=344} [2024-06-27 18:46:42,716 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 197 predicate places. [2024-06-27 18:46:42,716 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 344 transitions, 4448 flow [2024-06-27 18:46:42,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:42,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:42,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:42,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 18:46:42,717 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:46:42,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:42,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1936816897, now seen corresponding path program 4 times [2024-06-27 18:46:42,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:42,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897241748] [2024-06-27 18:46:42,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:42,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:46:45,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:45,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897241748] [2024-06-27 18:46:45,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897241748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:45,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:45,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:45,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465581485] [2024-06-27 18:46:45,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:45,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:45,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:45,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:45,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:45,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:45,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 344 transitions, 4448 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:45,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:45,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:45,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:48,761 INFO L124 PetriNetUnfolderBase]: 8653/13846 cut-off events. [2024-06-27 18:46:48,762 INFO L125 PetriNetUnfolderBase]: For 339141/339143 co-relation queries the response was YES. [2024-06-27 18:46:48,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82973 conditions, 13846 events. 8653/13846 cut-off events. For 339141/339143 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 94414 event pairs, 2202 based on Foata normal form. 2/13842 useless extension candidates. Maximal degree in co-relation 82855. Up to 12317 conditions per place. [2024-06-27 18:46:48,918 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 322 selfloop transitions, 52 changer transitions 0/381 dead transitions. [2024-06-27 18:46:48,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 381 transitions, 5288 flow [2024-06-27 18:46:48,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:46:48,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:46:48,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-27 18:46:48,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2024-06-27 18:46:48,920 INFO L175 Difference]: Start difference. First operand has 248 places, 344 transitions, 4448 flow. Second operand 8 states and 184 transitions. [2024-06-27 18:46:48,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 381 transitions, 5288 flow [2024-06-27 18:46:49,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 381 transitions, 5132 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-27 18:46:49,992 INFO L231 Difference]: Finished difference. Result has 251 places, 344 transitions, 4403 flow [2024-06-27 18:46:49,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4292, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4403, PETRI_PLACES=251, PETRI_TRANSITIONS=344} [2024-06-27 18:46:49,992 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 200 predicate places. [2024-06-27 18:46:49,992 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 344 transitions, 4403 flow [2024-06-27 18:46:49,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:49,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:49,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:49,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 18:46:49,993 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:46:49,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:49,994 INFO L85 PathProgramCache]: Analyzing trace with hash -980762289, now seen corresponding path program 3 times [2024-06-27 18:46:49,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:49,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796327306] [2024-06-27 18:46:49,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:49,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:46:52,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:52,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796327306] [2024-06-27 18:46:52,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796327306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:52,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:52,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:52,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082067092] [2024-06-27 18:46:52,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:52,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:52,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:52,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:52,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:52,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:52,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 344 transitions, 4403 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:52,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:52,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:52,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:55,704 INFO L124 PetriNetUnfolderBase]: 8648/13843 cut-off events. [2024-06-27 18:46:55,705 INFO L125 PetriNetUnfolderBase]: For 339308/339319 co-relation queries the response was YES. [2024-06-27 18:46:55,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82722 conditions, 13843 events. 8648/13843 cut-off events. For 339308/339319 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 94490 event pairs, 2163 based on Foata normal form. 8/13848 useless extension candidates. Maximal degree in co-relation 82603. Up to 12438 conditions per place. [2024-06-27 18:46:55,899 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 339 selfloop transitions, 32 changer transitions 0/378 dead transitions. [2024-06-27 18:46:55,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 378 transitions, 5311 flow [2024-06-27 18:46:55,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:46:55,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:46:55,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-27 18:46:55,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48024316109422494 [2024-06-27 18:46:55,901 INFO L175 Difference]: Start difference. First operand has 251 places, 344 transitions, 4403 flow. Second operand 7 states and 158 transitions. [2024-06-27 18:46:55,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 378 transitions, 5311 flow [2024-06-27 18:46:57,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 378 transitions, 5150 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 18:46:57,124 INFO L231 Difference]: Finished difference. Result has 250 places, 347 transitions, 4406 flow [2024-06-27 18:46:57,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4242, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4406, PETRI_PLACES=250, PETRI_TRANSITIONS=347} [2024-06-27 18:46:57,124 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 199 predicate places. [2024-06-27 18:46:57,124 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 347 transitions, 4406 flow [2024-06-27 18:46:57,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:57,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:57,125 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] [2024-06-27 18:46:57,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 18:46:57,125 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:46:57,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:57,125 INFO L85 PathProgramCache]: Analyzing trace with hash -911009644, now seen corresponding path program 1 times [2024-06-27 18:46:57,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:57,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542366636] [2024-06-27 18:46:57,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:57,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:46:59,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:59,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542366636] [2024-06-27 18:46:59,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542366636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:59,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:59,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:59,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841452869] [2024-06-27 18:46:59,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:59,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:59,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:59,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:59,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:59,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:59,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 347 transitions, 4406 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:59,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:59,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:59,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:03,459 INFO L124 PetriNetUnfolderBase]: 9330/14601 cut-off events. [2024-06-27 18:47:03,459 INFO L125 PetriNetUnfolderBase]: For 442739/442766 co-relation queries the response was YES. [2024-06-27 18:47:03,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91059 conditions, 14601 events. 9330/14601 cut-off events. For 442739/442766 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 97993 event pairs, 1389 based on Foata normal form. 40/14638 useless extension candidates. Maximal degree in co-relation 90939. Up to 11962 conditions per place. [2024-06-27 18:47:03,625 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 364 selfloop transitions, 72 changer transitions 0/443 dead transitions. [2024-06-27 18:47:03,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 443 transitions, 5947 flow [2024-06-27 18:47:03,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:47:03,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:47:03,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-06-27 18:47:03,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551063829787234 [2024-06-27 18:47:03,626 INFO L175 Difference]: Start difference. First operand has 250 places, 347 transitions, 4406 flow. Second operand 10 states and 259 transitions. [2024-06-27 18:47:03,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 443 transitions, 5947 flow [2024-06-27 18:47:04,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 443 transitions, 5805 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 18:47:04,859 INFO L231 Difference]: Finished difference. Result has 256 places, 356 transitions, 4635 flow [2024-06-27 18:47:04,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4264, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4635, PETRI_PLACES=256, PETRI_TRANSITIONS=356} [2024-06-27 18:47:04,860 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 205 predicate places. [2024-06-27 18:47:04,860 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 356 transitions, 4635 flow [2024-06-27 18:47:04,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:04,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:04,861 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] [2024-06-27 18:47:04,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 18:47:04,861 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:47:04,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:04,861 INFO L85 PathProgramCache]: Analyzing trace with hash -901486444, now seen corresponding path program 2 times [2024-06-27 18:47:04,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:04,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338907623] [2024-06-27 18:47:04,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:04,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:47:07,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:07,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338907623] [2024-06-27 18:47:07,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338907623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:07,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:07,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:47:07,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774941823] [2024-06-27 18:47:07,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:07,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:47:07,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:07,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:47:07,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:47:07,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:47:07,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 356 transitions, 4635 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:07,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:07,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:47:07,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:11,498 INFO L124 PetriNetUnfolderBase]: 9678/15167 cut-off events. [2024-06-27 18:47:11,498 INFO L125 PetriNetUnfolderBase]: For 490079/490106 co-relation queries the response was YES. [2024-06-27 18:47:11,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97221 conditions, 15167 events. 9678/15167 cut-off events. For 490079/490106 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 102718 event pairs, 1811 based on Foata normal form. 44/15208 useless extension candidates. Maximal degree in co-relation 97099. Up to 12982 conditions per place. [2024-06-27 18:47:11,706 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 365 selfloop transitions, 66 changer transitions 0/438 dead transitions. [2024-06-27 18:47:11,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 438 transitions, 5910 flow [2024-06-27 18:47:11,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:47:11,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:47:11,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2024-06-27 18:47:11,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5361702127659574 [2024-06-27 18:47:11,709 INFO L175 Difference]: Start difference. First operand has 256 places, 356 transitions, 4635 flow. Second operand 10 states and 252 transitions. [2024-06-27 18:47:11,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 438 transitions, 5910 flow [2024-06-27 18:47:13,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 438 transitions, 5751 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 18:47:13,801 INFO L231 Difference]: Finished difference. Result has 260 places, 359 transitions, 4716 flow [2024-06-27 18:47:13,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4484, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4716, PETRI_PLACES=260, PETRI_TRANSITIONS=359} [2024-06-27 18:47:13,801 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 209 predicate places. [2024-06-27 18:47:13,802 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 359 transitions, 4716 flow [2024-06-27 18:47:13,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:13,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:13,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:47:13,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 18:47:13,806 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:47:13,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:13,807 INFO L85 PathProgramCache]: Analyzing trace with hash -232430832, now seen corresponding path program 3 times [2024-06-27 18:47:13,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:13,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235144127] [2024-06-27 18:47:13,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:13,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:47:16,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:16,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235144127] [2024-06-27 18:47:16,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235144127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:16,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:16,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:47:16,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532743587] [2024-06-27 18:47:16,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:16,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:47:16,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:16,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:47:16,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:47:16,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:47:16,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 359 transitions, 4716 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:16,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:16,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:47:16,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:20,485 INFO L124 PetriNetUnfolderBase]: 9632/15085 cut-off events. [2024-06-27 18:47:20,485 INFO L125 PetriNetUnfolderBase]: For 446957/446978 co-relation queries the response was YES. [2024-06-27 18:47:20,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95103 conditions, 15085 events. 9632/15085 cut-off events. For 446957/446978 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 101970 event pairs, 1826 based on Foata normal form. 36/15118 useless extension candidates. Maximal degree in co-relation 94979. Up to 12916 conditions per place. [2024-06-27 18:47:20,656 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 349 selfloop transitions, 59 changer transitions 0/415 dead transitions. [2024-06-27 18:47:20,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 415 transitions, 5779 flow [2024-06-27 18:47:20,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:47:20,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:47:20,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 18:47:20,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2024-06-27 18:47:20,658 INFO L175 Difference]: Start difference. First operand has 260 places, 359 transitions, 4716 flow. Second operand 8 states and 199 transitions. [2024-06-27 18:47:20,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 415 transitions, 5779 flow [2024-06-27 18:47:21,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 415 transitions, 5546 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-27 18:47:21,926 INFO L231 Difference]: Finished difference. Result has 260 places, 360 transitions, 4649 flow [2024-06-27 18:47:21,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4503, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4649, PETRI_PLACES=260, PETRI_TRANSITIONS=360} [2024-06-27 18:47:21,927 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 209 predicate places. [2024-06-27 18:47:21,927 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 360 transitions, 4649 flow [2024-06-27 18:47:21,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:21,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:21,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:47:21,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 18:47:21,928 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:47:21,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:21,928 INFO L85 PathProgramCache]: Analyzing trace with hash -439110870, now seen corresponding path program 1 times [2024-06-27 18:47:21,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:21,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768949488] [2024-06-27 18:47:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:21,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:47:24,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:24,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768949488] [2024-06-27 18:47:24,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768949488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:24,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:24,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:47:24,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898167] [2024-06-27 18:47:24,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:24,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:47:24,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:24,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:47:24,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:47:24,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:47:24,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 360 transitions, 4649 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:24,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:24,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:47:24,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:28,450 INFO L124 PetriNetUnfolderBase]: 10128/15676 cut-off events. [2024-06-27 18:47:28,450 INFO L125 PetriNetUnfolderBase]: For 449820/449826 co-relation queries the response was YES. [2024-06-27 18:47:28,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98545 conditions, 15676 events. 10128/15676 cut-off events. For 449820/449826 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 104721 event pairs, 1832 based on Foata normal form. 12/15682 useless extension candidates. Maximal degree in co-relation 98420. Up to 12246 conditions per place. [2024-06-27 18:47:28,689 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 297 selfloop transitions, 158 changer transitions 0/462 dead transitions. [2024-06-27 18:47:28,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 462 transitions, 6527 flow [2024-06-27 18:47:28,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:47:28,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:47:28,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 282 transitions. [2024-06-27 18:47:28,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-27 18:47:28,691 INFO L175 Difference]: Start difference. First operand has 260 places, 360 transitions, 4649 flow. Second operand 11 states and 282 transitions. [2024-06-27 18:47:28,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 462 transitions, 6527 flow [2024-06-27 18:47:30,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 462 transitions, 6398 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 18:47:30,187 INFO L231 Difference]: Finished difference. Result has 267 places, 377 transitions, 5267 flow [2024-06-27 18:47:30,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4520, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5267, PETRI_PLACES=267, PETRI_TRANSITIONS=377} [2024-06-27 18:47:30,188 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 216 predicate places. [2024-06-27 18:47:30,188 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 377 transitions, 5267 flow [2024-06-27 18:47:30,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:30,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:30,188 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] [2024-06-27 18:47:30,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 18:47:30,188 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:47:30,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:30,189 INFO L85 PathProgramCache]: Analyzing trace with hash -438961140, now seen corresponding path program 2 times [2024-06-27 18:47:30,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:30,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584094439] [2024-06-27 18:47:30,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:30,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:30,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:47:33,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:33,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584094439] [2024-06-27 18:47:33,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584094439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:33,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:33,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:47:33,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454169830] [2024-06-27 18:47:33,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:33,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:47:33,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:33,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:47:33,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:47:33,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:47:33,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 377 transitions, 5267 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:33,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:33,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:47:33,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:37,863 INFO L124 PetriNetUnfolderBase]: 10220/15786 cut-off events. [2024-06-27 18:47:37,863 INFO L125 PetriNetUnfolderBase]: For 490402/490404 co-relation queries the response was YES. [2024-06-27 18:47:38,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104100 conditions, 15786 events. 10220/15786 cut-off events. For 490402/490404 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 105235 event pairs, 1872 based on Foata normal form. 4/15784 useless extension candidates. Maximal degree in co-relation 103972. Up to 12314 conditions per place. [2024-06-27 18:47:38,345 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 287 selfloop transitions, 160 changer transitions 0/454 dead transitions. [2024-06-27 18:47:38,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 454 transitions, 6859 flow [2024-06-27 18:47:38,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:47:38,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:47:38,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-06-27 18:47:38,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551063829787234 [2024-06-27 18:47:38,347 INFO L175 Difference]: Start difference. First operand has 267 places, 377 transitions, 5267 flow. Second operand 10 states and 259 transitions. [2024-06-27 18:47:38,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 454 transitions, 6859 flow [2024-06-27 18:47:40,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 454 transitions, 6535 flow, removed 126 selfloop flow, removed 5 redundant places. [2024-06-27 18:47:40,037 INFO L231 Difference]: Finished difference. Result has 272 places, 382 transitions, 5397 flow [2024-06-27 18:47:40,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4995, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5397, PETRI_PLACES=272, PETRI_TRANSITIONS=382} [2024-06-27 18:47:40,038 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 221 predicate places. [2024-06-27 18:47:40,038 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 382 transitions, 5397 flow [2024-06-27 18:47:40,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:40,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:40,039 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] [2024-06-27 18:47:40,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 18:47:40,039 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:47:40,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:40,039 INFO L85 PathProgramCache]: Analyzing trace with hash -232307700, now seen corresponding path program 3 times [2024-06-27 18:47:40,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:40,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679413178] [2024-06-27 18:47:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:40,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:40,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:47:43,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:43,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679413178] [2024-06-27 18:47:43,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679413178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:43,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:43,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:47:43,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108432049] [2024-06-27 18:47:43,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:43,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:47:43,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:43,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:47:43,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:47:43,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:47:43,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 382 transitions, 5397 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:43,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:43,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:47:43,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:47,369 INFO L124 PetriNetUnfolderBase]: 10208/15798 cut-off events. [2024-06-27 18:47:47,369 INFO L125 PetriNetUnfolderBase]: For 482580/482582 co-relation queries the response was YES. [2024-06-27 18:47:47,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101810 conditions, 15798 events. 10208/15798 cut-off events. For 482580/482582 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 105592 event pairs, 1982 based on Foata normal form. 4/15796 useless extension candidates. Maximal degree in co-relation 101680. Up to 12306 conditions per place. [2024-06-27 18:47:47,557 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 279 selfloop transitions, 147 changer transitions 0/433 dead transitions. [2024-06-27 18:47:47,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 433 transitions, 6585 flow [2024-06-27 18:47:47,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:47:47,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:47:47,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 18:47:47,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-27 18:47:47,559 INFO L175 Difference]: Start difference. First operand has 272 places, 382 transitions, 5397 flow. Second operand 8 states and 204 transitions. [2024-06-27 18:47:47,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 433 transitions, 6585 flow [2024-06-27 18:47:49,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 433 transitions, 6183 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-27 18:47:49,104 INFO L231 Difference]: Finished difference. Result has 273 places, 382 transitions, 5299 flow [2024-06-27 18:47:49,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4997, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5299, PETRI_PLACES=273, PETRI_TRANSITIONS=382} [2024-06-27 18:47:49,104 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 222 predicate places. [2024-06-27 18:47:49,105 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 382 transitions, 5299 flow [2024-06-27 18:47:49,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:49,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:49,105 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] [2024-06-27 18:47:49,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 18:47:49,105 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:47:49,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:49,106 INFO L85 PathProgramCache]: Analyzing trace with hash 582897994, now seen corresponding path program 1 times [2024-06-27 18:47:49,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:49,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690858461] [2024-06-27 18:47:49,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:49,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:49,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:47:52,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:52,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690858461] [2024-06-27 18:47:52,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690858461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:52,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:52,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:47:52,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258343694] [2024-06-27 18:47:52,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:52,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:47:52,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:52,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:47:52,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:47:52,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:47:52,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 382 transitions, 5299 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:52,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:52,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:47:52,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:56,957 INFO L124 PetriNetUnfolderBase]: 10651/16564 cut-off events. [2024-06-27 18:47:56,968 INFO L125 PetriNetUnfolderBase]: For 542313/542334 co-relation queries the response was YES. [2024-06-27 18:47:57,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106898 conditions, 16564 events. 10651/16564 cut-off events. For 542313/542334 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 112819 event pairs, 1860 based on Foata normal form. 28/16589 useless extension candidates. Maximal degree in co-relation 106767. Up to 13210 conditions per place. [2024-06-27 18:47:57,162 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 376 selfloop transitions, 63 changer transitions 0/446 dead transitions. [2024-06-27 18:47:57,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 446 transitions, 6743 flow [2024-06-27 18:47:57,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:47:57,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:47:57,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 18:47:57,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345744680851063 [2024-06-27 18:47:57,164 INFO L175 Difference]: Start difference. First operand has 273 places, 382 transitions, 5299 flow. Second operand 8 states and 201 transitions. [2024-06-27 18:47:57,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 446 transitions, 6743 flow [2024-06-27 18:47:58,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 446 transitions, 6431 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 18:47:58,719 INFO L231 Difference]: Finished difference. Result has 274 places, 388 transitions, 5346 flow [2024-06-27 18:47:58,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4987, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5346, PETRI_PLACES=274, PETRI_TRANSITIONS=388} [2024-06-27 18:47:58,719 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 223 predicate places. [2024-06-27 18:47:58,719 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 388 transitions, 5346 flow [2024-06-27 18:47:58,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:58,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:58,720 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] [2024-06-27 18:47:58,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 18:47:58,720 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:47:58,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:58,720 INFO L85 PathProgramCache]: Analyzing trace with hash -782271728, now seen corresponding path program 4 times [2024-06-27 18:47:58,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:58,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668646601] [2024-06-27 18:47:58,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:58,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:48:01,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:01,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668646601] [2024-06-27 18:48:01,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668646601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:01,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:01,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:48:01,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416636488] [2024-06-27 18:48:01,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:01,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:48:01,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:01,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:48:01,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:48:01,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:48:01,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 388 transitions, 5346 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:48:01,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:01,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:48:01,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:06,455 INFO L124 PetriNetUnfolderBase]: 10929/17002 cut-off events. [2024-06-27 18:48:06,456 INFO L125 PetriNetUnfolderBase]: For 594294/594333 co-relation queries the response was YES. [2024-06-27 18:48:06,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110694 conditions, 17002 events. 10929/17002 cut-off events. For 594294/594333 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 115973 event pairs, 1901 based on Foata normal form. 40/17028 useless extension candidates. Maximal degree in co-relation 110561. Up to 14271 conditions per place. [2024-06-27 18:48:06,805 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 355 selfloop transitions, 80 changer transitions 0/442 dead transitions. [2024-06-27 18:48:06,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 442 transitions, 6624 flow [2024-06-27 18:48:06,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:48:06,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:48:06,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 18:48:06,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186170212765957 [2024-06-27 18:48:06,807 INFO L175 Difference]: Start difference. First operand has 274 places, 388 transitions, 5346 flow. Second operand 8 states and 195 transitions. [2024-06-27 18:48:06,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 442 transitions, 6624 flow [2024-06-27 18:48:08,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 442 transitions, 6459 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-27 18:48:08,904 INFO L231 Difference]: Finished difference. Result has 278 places, 390 transitions, 5407 flow [2024-06-27 18:48:08,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5181, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5407, PETRI_PLACES=278, PETRI_TRANSITIONS=390} [2024-06-27 18:48:08,905 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 227 predicate places. [2024-06-27 18:48:08,905 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 390 transitions, 5407 flow [2024-06-27 18:48:08,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:48:08,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:08,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:48:08,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 18:48:08,905 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:48:08,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:08,906 INFO L85 PathProgramCache]: Analyzing trace with hash 539794470, now seen corresponding path program 4 times [2024-06-27 18:48:08,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:08,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739060078] [2024-06-27 18:48:08,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:08,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat