./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi006_rmo.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/rfi006_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi006_rmo.i ./goblint.2024-06-19_11-23-25.files/protection/rfi006_rmo.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 17:08:18,034 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:08:18,107 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:08:18,112 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:08:18,112 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:08:18,137 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:08:18,137 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:08:18,137 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:08:18,138 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:08:18,141 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:08:18,141 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:08:18,141 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:08:18,142 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:08:18,143 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:08:18,143 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:08:18,143 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:08:18,144 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:08:18,144 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:08:18,144 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:08:18,144 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:08:18,145 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:08:18,145 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:08:18,145 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:08:18,145 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:08:18,146 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:08:18,146 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:08:18,146 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:08:18,146 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:08:18,147 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:08:18,147 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:08:18,148 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:08:18,148 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:08:18,148 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:08:18,148 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:08:18,148 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:08:18,149 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:08:18,149 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:08:18,149 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:08:18,149 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:08:18,149 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:08:18,149 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:08:18,152 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:08:18,152 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:08:18,152 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:08:18,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:08:18,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:08:18,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:08:18,378 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:08:18,378 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:08:18,379 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/rfi006_rmo.yml/witness.yml [2024-06-21 17:08:18,533 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:08:18,533 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:08:18,534 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi006_rmo.i [2024-06-21 17:08:19,564 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:08:19,786 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:08:19,789 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi006_rmo.i [2024-06-21 17:08:19,806 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44bd09b98/6736c07ba4a7442f9e3e8cc756e9bea6/FLAGfbe1c70d6 [2024-06-21 17:08:19,816 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44bd09b98/6736c07ba4a7442f9e3e8cc756e9bea6 [2024-06-21 17:08:19,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:08:19,817 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:08:19,818 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:08:19,818 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:08:19,822 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:08:19,822 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:08:18" (1/2) ... [2024-06-21 17:08:19,823 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36cec1f8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:08:19, skipping insertion in model container [2024-06-21 17:08:19,823 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:08:18" (1/2) ... [2024-06-21 17:08:19,824 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1ccd4bc3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:08:19, skipping insertion in model container [2024-06-21 17:08:19,824 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:08:19" (2/2) ... [2024-06-21 17:08:19,825 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36cec1f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:08:19, skipping insertion in model container [2024-06-21 17:08:19,825 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:08:19" (2/2) ... [2024-06-21 17:08:19,825 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:08:19,957 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:08:19,958 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ((((((((((((((((((((((((((((((((((((! 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$mem_tmp == 0) [2024-06-21 17:08:19,958 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$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) [2024-06-21 17:08:19,958 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) [2024-06-21 17:08:19,959 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:08:19,959 INFO L106 edCorrectnessWitness]: ghost_update [L848-L848] multithreaded = 1; [2024-06-21 17:08:19,996 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:08:20,364 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:08:20,374 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:08:20,482 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:08:20,521 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:08:20,522 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:08:20 WrapperNode [2024-06-21 17:08:20,522 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:08:20,523 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:08:20,523 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:08:20,523 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:08:20,529 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:08:20" (1/1) ... [2024-06-21 17:08:20,556 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:08:20" (1/1) ... [2024-06-21 17:08:20,585 INFO L138 Inliner]: procedures = 175, calls = 74, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 172 [2024-06-21 17:08:20,586 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:08:20,586 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:08:20,587 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:08:20,587 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:08:20,601 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:08:20" (1/1) ... [2024-06-21 17:08:20,602 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:08:20" (1/1) ... [2024-06-21 17:08:20,611 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:08:20" (1/1) ... [2024-06-21 17:08:20,629 INFO L175 MemorySlicer]: Split 33 memory accesses to 2 slices as follows [2, 31]. 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]. [2024-06-21 17:08:20,635 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:08:20" (1/1) ... [2024-06-21 17:08:20,635 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:08:20" (1/1) ... [2024-06-21 17:08:20,649 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:08:20" (1/1) ... [2024-06-21 17:08:20,657 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:08:20" (1/1) ... [2024-06-21 17:08:20,667 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:08:20" (1/1) ... [2024-06-21 17:08:20,669 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:08:20" (1/1) ... [2024-06-21 17:08:20,678 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:08:20,679 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:08:20,679 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:08:20,679 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:08:20,680 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:08:20" (1/1) ... [2024-06-21 17:08:20,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:08:20,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:08:20,718 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 17:08:20,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 17:08:20,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 17:08:20,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 17:08:20,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 17:08:20,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 17:08:20,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:08:20,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:08:20,756 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:08:20,757 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:08:20,757 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:08:20,757 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:08:20,758 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:08:20,758 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:08:20,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:08:20,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 17:08:20,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:08:20,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:08:20,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:08:20,761 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:08:20,874 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:08:20,876 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:08:21,310 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:08:21,310 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:08:21,572 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:08:21,572 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:08:21,573 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:08:21 BoogieIcfgContainer [2024-06-21 17:08:21,573 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:08:21,575 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:08:21,576 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:08:21,578 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:08:21,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:08:18" (1/4) ... [2024-06-21 17:08:21,579 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@581dc4e4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:08:21, skipping insertion in model container [2024-06-21 17:08:21,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:08:19" (2/4) ... [2024-06-21 17:08:21,579 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@581dc4e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:08:21, skipping insertion in model container [2024-06-21 17:08:21,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:08:20" (3/4) ... [2024-06-21 17:08:21,579 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@581dc4e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:08:21, skipping insertion in model container [2024-06-21 17:08:21,580 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:08:21" (4/4) ... [2024-06-21 17:08:21,580 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi006_rmo.i [2024-06-21 17:08:21,594 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:08:21,594 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 17:08:21,594 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:08:21,641 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:08:21,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 17:08:21,698 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 17:08:21,699 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:08:21,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:08:21,701 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 17:08:21,704 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 17:08:21,716 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:08:21,721 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;@79a677c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:08:21,722 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 17:08:21,726 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:08:21,726 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:08:21,726 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:08:21,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:08:21,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:08:21,727 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:08:21,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:08:21,734 INFO L85 PathProgramCache]: Analyzing trace with hash 648656297, now seen corresponding path program 1 times [2024-06-21 17:08:21,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:08:21,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208722272] [2024-06-21 17:08:21,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:08:21,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:08:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:08:23,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:08:23,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:08:23,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208722272] [2024-06-21 17:08:23,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208722272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:08:23,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:08:23,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:08:23,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665871757] [2024-06-21 17:08:23,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:08:23,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:08:23,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:08:23,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:08:23,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:08:23,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 17:08:23,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:23,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:08:23,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 17:08:23,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:08:23,834 INFO L124 PetriNetUnfolderBase]: 990/1587 cut-off events. [2024-06-21 17:08:23,835 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-21 17:08:23,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3167 conditions, 1587 events. 990/1587 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7807 event pairs, 650 based on Foata normal form. 1/1551 useless extension candidates. Maximal degree in co-relation 3155. Up to 1503 conditions per place. [2024-06-21 17:08:23,847 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-21 17:08:23,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 181 flow [2024-06-21 17:08:23,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:08:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:08:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-21 17:08:23,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-21 17:08:23,858 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-21 17:08:23,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 181 flow [2024-06-21 17:08:23,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:08:23,863 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 17:08:23,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 17:08:23,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 17:08:23,868 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 17:08:23,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:23,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:08:23,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:08:23,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:08:23,869 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:08:23,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:08:23,870 INFO L85 PathProgramCache]: Analyzing trace with hash 588479912, now seen corresponding path program 1 times [2024-06-21 17:08:23,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:08:23,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757942905] [2024-06-21 17:08:23,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:08:23,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:08:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:08:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:08:25,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:08:25,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757942905] [2024-06-21 17:08:25,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757942905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:08:25,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:08:25,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:08:25,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319315107] [2024-06-21 17:08:25,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:08:25,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:08:25,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:08:25,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:08:25,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:08:25,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 17:08:25,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:25,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:08:25,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 17:08:25,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:08:26,299 INFO L124 PetriNetUnfolderBase]: 984/1578 cut-off events. [2024-06-21 17:08:26,299 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2024-06-21 17:08:26,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3587 conditions, 1578 events. 984/1578 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7740 event pairs, 540 based on Foata normal form. 3/1573 useless extension candidates. Maximal degree in co-relation 3575. Up to 1475 conditions per place. [2024-06-21 17:08:26,306 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 43 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-21 17:08:26,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 256 flow [2024-06-21 17:08:26,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:08:26,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:08:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-21 17:08:26,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-21 17:08:26,308 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 93 transitions. [2024-06-21 17:08:26,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 256 flow [2024-06-21 17:08:26,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:08:26,310 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 17:08:26,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 17:08:26,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 17:08:26,311 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 17:08:26,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:26,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:08:26,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:08:26,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:08:26,311 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:08:26,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:08:26,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1063009287, now seen corresponding path program 1 times [2024-06-21 17:08:26,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:08:26,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370354749] [2024-06-21 17:08:26,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:08:26,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:08:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:08:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:08:28,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:08:28,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370354749] [2024-06-21 17:08:28,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370354749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:08:28,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:08:28,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 17:08:28,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045851447] [2024-06-21 17:08:28,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:08:28,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 17:08:28,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:08:28,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 17:08:28,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 17:08:28,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:08:28,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:28,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:08:28,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:08:28,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:08:28,896 INFO L124 PetriNetUnfolderBase]: 1209/1891 cut-off events. [2024-06-21 17:08:28,896 INFO L125 PetriNetUnfolderBase]: For 982/982 co-relation queries the response was YES. [2024-06-21 17:08:28,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4798 conditions, 1891 events. 1209/1891 cut-off events. For 982/982 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9145 event pairs, 475 based on Foata normal form. 5/1890 useless extension candidates. Maximal degree in co-relation 4784. Up to 1726 conditions per place. [2024-06-21 17:08:28,906 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 16 changer transitions 0/81 dead transitions. [2024-06-21 17:08:28,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 81 transitions, 420 flow [2024-06-21 17:08:28,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:08:28,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:08:28,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-21 17:08:28,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-21 17:08:28,909 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 119 transitions. [2024-06-21 17:08:28,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 81 transitions, 420 flow [2024-06-21 17:08:28,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 81 transitions, 406 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 17:08:28,913 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-21 17:08:28,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-21 17:08:28,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-21 17:08:28,914 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-21 17:08:28,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:28,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:08:28,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:08:28,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:08:28,914 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:08:28,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:08:28,915 INFO L85 PathProgramCache]: Analyzing trace with hash -651441542, now seen corresponding path program 1 times [2024-06-21 17:08:28,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:08:28,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859339191] [2024-06-21 17:08:28,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:08:28,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:08:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:08:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:08:30,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:08:30,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859339191] [2024-06-21 17:08:30,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859339191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:08:30,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:08:30,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:08:30,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947327313] [2024-06-21 17:08:30,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:08:30,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:08:30,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:08:30,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:08:30,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:08:30,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:08:30,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:30,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:08:30,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:08:30,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:08:31,758 INFO L124 PetriNetUnfolderBase]: 1224/1916 cut-off events. [2024-06-21 17:08:31,759 INFO L125 PetriNetUnfolderBase]: For 2351/2354 co-relation queries the response was YES. [2024-06-21 17:08:31,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5767 conditions, 1916 events. 1224/1916 cut-off events. For 2351/2354 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9273 event pairs, 330 based on Foata normal form. 12/1922 useless extension candidates. Maximal degree in co-relation 5750. Up to 1687 conditions per place. [2024-06-21 17:08:31,769 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 64 selfloop transitions, 19 changer transitions 0/89 dead transitions. [2024-06-21 17:08:31,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 89 transitions, 527 flow [2024-06-21 17:08:31,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:08:31,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:08:31,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-21 17:08:31,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-21 17:08:31,773 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 136 transitions. [2024-06-21 17:08:31,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 89 transitions, 527 flow [2024-06-21 17:08:31,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 89 transitions, 519 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 17:08:31,780 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 293 flow [2024-06-21 17:08:31,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-21 17:08:31,781 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-21 17:08:31,781 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 293 flow [2024-06-21 17:08:31,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:31,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:08:31,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:08:31,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:08:31,782 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:08:31,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:08:31,783 INFO L85 PathProgramCache]: Analyzing trace with hash 565299834, now seen corresponding path program 1 times [2024-06-21 17:08:31,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:08:31,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068086999] [2024-06-21 17:08:31,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:08:31,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:08:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:08:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:08:32,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:08:32,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068086999] [2024-06-21 17:08:32,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068086999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:08:32,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:08:32,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:08:32,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100265175] [2024-06-21 17:08:32,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:08:32,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:08:32,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:08:32,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:08:32,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:08:32,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:08:32,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:32,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:08:32,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:08:32,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:08:33,686 INFO L124 PetriNetUnfolderBase]: 1219/1906 cut-off events. [2024-06-21 17:08:33,686 INFO L125 PetriNetUnfolderBase]: For 3470/3470 co-relation queries the response was YES. [2024-06-21 17:08:33,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6271 conditions, 1906 events. 1219/1906 cut-off events. For 3470/3470 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9188 event pairs, 468 based on Foata normal form. 2/1902 useless extension candidates. Maximal degree in co-relation 6250. Up to 1831 conditions per place. [2024-06-21 17:08:33,697 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 53 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-06-21 17:08:33,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 449 flow [2024-06-21 17:08:33,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:08:33,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:08:33,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-21 17:08:33,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 17:08:33,700 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 293 flow. Second operand 5 states and 89 transitions. [2024-06-21 17:08:33,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 449 flow [2024-06-21 17:08:33,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 399 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 17:08:33,709 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 267 flow [2024-06-21 17:08:33,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-21 17:08:33,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-21 17:08:33,711 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 267 flow [2024-06-21 17:08:33,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:33,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:08:33,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:08:33,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:08:33,712 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:08:33,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:08:33,713 INFO L85 PathProgramCache]: Analyzing trace with hash 343216375, now seen corresponding path program 1 times [2024-06-21 17:08:33,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:08:33,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684843016] [2024-06-21 17:08:33,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:08:33,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:08:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:08:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:08:35,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:08:35,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684843016] [2024-06-21 17:08:35,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684843016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:08:35,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:08:35,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:08:35,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525473888] [2024-06-21 17:08:35,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:08:35,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:08:35,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:08:35,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:08:35,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:08:35,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:08:35,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:35,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:08:35,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:08:35,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:08:36,210 INFO L124 PetriNetUnfolderBase]: 1209/1894 cut-off events. [2024-06-21 17:08:36,210 INFO L125 PetriNetUnfolderBase]: For 4025/4025 co-relation queries the response was YES. [2024-06-21 17:08:36,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6208 conditions, 1894 events. 1209/1894 cut-off events. For 4025/4025 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9070 event pairs, 438 based on Foata normal form. 4/1895 useless extension candidates. Maximal degree in co-relation 6185. Up to 1795 conditions per place. [2024-06-21 17:08:36,219 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-21 17:08:36,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 75 transitions, 473 flow [2024-06-21 17:08:36,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:08:36,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:08:36,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 17:08:36,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 17:08:36,221 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 267 flow. Second operand 6 states and 106 transitions. [2024-06-21 17:08:36,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 75 transitions, 473 flow [2024-06-21 17:08:36,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 451 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 17:08:36,228 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 299 flow [2024-06-21 17:08:36,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=299, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-21 17:08:36,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 17:08:36,229 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 299 flow [2024-06-21 17:08:36,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:36,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:08:36,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:08:36,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:08:36,229 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:08:36,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:08:36,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1632155863, now seen corresponding path program 1 times [2024-06-21 17:08:36,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:08:36,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772744140] [2024-06-21 17:08:36,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:08:36,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:08:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:08:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:08:38,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:08:38,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772744140] [2024-06-21 17:08:38,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772744140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:08:38,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:08:38,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:08:38,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721060438] [2024-06-21 17:08:38,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:08:38,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:08:38,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:08:38,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:08:38,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:08:38,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:08:38,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 299 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:38,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:08:38,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:08:38,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:08:39,106 INFO L124 PetriNetUnfolderBase]: 1217/1905 cut-off events. [2024-06-21 17:08:39,106 INFO L125 PetriNetUnfolderBase]: For 5205/5211 co-relation queries the response was YES. [2024-06-21 17:08:39,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6693 conditions, 1905 events. 1217/1905 cut-off events. For 5205/5211 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9166 event pairs, 449 based on Foata normal form. 8/1909 useless extension candidates. Maximal degree in co-relation 6670. Up to 1737 conditions per place. [2024-06-21 17:08:39,119 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-21 17:08:39,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 83 transitions, 561 flow [2024-06-21 17:08:39,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:08:39,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:08:39,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-21 17:08:39,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-21 17:08:39,120 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 299 flow. Second operand 6 states and 115 transitions. [2024-06-21 17:08:39,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 83 transitions, 561 flow [2024-06-21 17:08:39,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 531 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 17:08:39,125 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 341 flow [2024-06-21 17:08:39,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-21 17:08:39,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-21 17:08:39,126 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 341 flow [2024-06-21 17:08:39,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:39,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:08:39,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:08:39,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:08:39,127 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:08:39,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:08:39,127 INFO L85 PathProgramCache]: Analyzing trace with hash 2087303353, now seen corresponding path program 2 times [2024-06-21 17:08:39,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:08:39,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622361031] [2024-06-21 17:08:39,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:08:39,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:08:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:08:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:08:40,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:08:40,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622361031] [2024-06-21 17:08:40,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622361031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:08:40,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:08:40,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:08:40,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617028012] [2024-06-21 17:08:40,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:08:40,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:08:40,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:08:40,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:08:40,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:08:40,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:08:40,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:40,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:08:40,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:08:40,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:08:41,742 INFO L124 PetriNetUnfolderBase]: 1205/1876 cut-off events. [2024-06-21 17:08:41,742 INFO L125 PetriNetUnfolderBase]: For 6242/6242 co-relation queries the response was YES. [2024-06-21 17:08:41,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6809 conditions, 1876 events. 1205/1876 cut-off events. For 6242/6242 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8939 event pairs, 467 based on Foata normal form. 2/1869 useless extension candidates. Maximal degree in co-relation 6785. Up to 1721 conditions per place. [2024-06-21 17:08:41,752 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 52 selfloop transitions, 20 changer transitions 0/77 dead transitions. [2024-06-21 17:08:41,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 77 transitions, 531 flow [2024-06-21 17:08:41,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:08:41,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:08:41,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 17:08:41,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 17:08:41,755 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 341 flow. Second operand 6 states and 110 transitions. [2024-06-21 17:08:41,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 77 transitions, 531 flow [2024-06-21 17:08:41,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 77 transitions, 502 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:08:41,759 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 360 flow [2024-06-21 17:08:41,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=360, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-06-21 17:08:41,761 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-21 17:08:41,761 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 360 flow [2024-06-21 17:08:41,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:41,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:08:41,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:08:41,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:08:41,762 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:08:41,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:08:41,762 INFO L85 PathProgramCache]: Analyzing trace with hash -416177340, now seen corresponding path program 1 times [2024-06-21 17:08:41,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:08:41,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591945857] [2024-06-21 17:08:41,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:08:41,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:08:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:08:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:08:43,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:08:43,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591945857] [2024-06-21 17:08:43,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591945857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:08:43,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:08:43,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:08:43,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045772906] [2024-06-21 17:08:43,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:08:43,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:08:43,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:08:43,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:08:43,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:08:43,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:08:43,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 360 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:43,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:08:43,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:08:43,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:08:45,439 INFO L124 PetriNetUnfolderBase]: 1749/2702 cut-off events. [2024-06-21 17:08:45,439 INFO L125 PetriNetUnfolderBase]: For 10432/10432 co-relation queries the response was YES. [2024-06-21 17:08:45,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9971 conditions, 2702 events. 1749/2702 cut-off events. For 10432/10432 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13616 event pairs, 427 based on Foata normal form. 16/2711 useless extension candidates. Maximal degree in co-relation 9946. Up to 1852 conditions per place. [2024-06-21 17:08:45,456 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 103 selfloop transitions, 57 changer transitions 0/165 dead transitions. [2024-06-21 17:08:45,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 165 transitions, 1271 flow [2024-06-21 17:08:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:08:45,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:08:45,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 228 transitions. [2024-06-21 17:08:45,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 17:08:45,458 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 360 flow. Second operand 12 states and 228 transitions. [2024-06-21 17:08:45,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 165 transitions, 1271 flow [2024-06-21 17:08:45,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 165 transitions, 1145 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 17:08:45,470 INFO L231 Difference]: Finished difference. Result has 77 places, 100 transitions, 739 flow [2024-06-21 17:08:45,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=739, PETRI_PLACES=77, PETRI_TRANSITIONS=100} [2024-06-21 17:08:45,470 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-21 17:08:45,470 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 100 transitions, 739 flow [2024-06-21 17:08:45,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:45,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:08:45,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:08:45,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:08:45,471 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:08:45,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:08:45,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1912989274, now seen corresponding path program 2 times [2024-06-21 17:08:45,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:08:45,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259101903] [2024-06-21 17:08:45,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:08:45,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:08:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:08:47,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:08:47,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:08:47,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259101903] [2024-06-21 17:08:47,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259101903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:08:47,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:08:47,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:08:47,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972476714] [2024-06-21 17:08:47,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:08:47,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:08:47,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:08:47,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:08:47,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:08:47,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:08:47,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 100 transitions, 739 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:47,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:08:47,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:08:47,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:08:48,922 INFO L124 PetriNetUnfolderBase]: 1837/2866 cut-off events. [2024-06-21 17:08:48,922 INFO L125 PetriNetUnfolderBase]: For 18095/18101 co-relation queries the response was YES. [2024-06-21 17:08:48,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13204 conditions, 2866 events. 1837/2866 cut-off events. For 18095/18101 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 14779 event pairs, 468 based on Foata normal form. 16/2875 useless extension candidates. Maximal degree in co-relation 13171. Up to 2236 conditions per place. [2024-06-21 17:08:48,937 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 89 selfloop transitions, 48 changer transitions 0/142 dead transitions. [2024-06-21 17:08:48,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 142 transitions, 1251 flow [2024-06-21 17:08:48,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:08:48,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:08:48,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 17:08:48,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-21 17:08:48,939 INFO L175 Difference]: Start difference. First operand has 77 places, 100 transitions, 739 flow. Second operand 7 states and 137 transitions. [2024-06-21 17:08:48,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 142 transitions, 1251 flow [2024-06-21 17:08:48,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 142 transitions, 1209 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 17:08:48,956 INFO L231 Difference]: Finished difference. Result has 82 places, 107 transitions, 884 flow [2024-06-21 17:08:48,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=884, PETRI_PLACES=82, PETRI_TRANSITIONS=107} [2024-06-21 17:08:48,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-21 17:08:48,957 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 107 transitions, 884 flow [2024-06-21 17:08:48,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:48,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:08:48,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:08:48,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:08:48,958 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:08:48,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:08:48,958 INFO L85 PathProgramCache]: Analyzing trace with hash 281896068, now seen corresponding path program 3 times [2024-06-21 17:08:48,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:08:48,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852225914] [2024-06-21 17:08:48,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:08:48,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:08:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:08:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:08:50,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:08:50,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852225914] [2024-06-21 17:08:50,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852225914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:08:50,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:08:50,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:08:50,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109950076] [2024-06-21 17:08:50,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:08:50,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:08:50,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:08:50,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:08:50,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:08:51,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:08:51,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 107 transitions, 884 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:51,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:08:51,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:08:51,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:08:52,250 INFO L124 PetriNetUnfolderBase]: 1881/2919 cut-off events. [2024-06-21 17:08:52,250 INFO L125 PetriNetUnfolderBase]: For 21822/21826 co-relation queries the response was YES. [2024-06-21 17:08:52,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14316 conditions, 2919 events. 1881/2919 cut-off events. For 21822/21826 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14883 event pairs, 477 based on Foata normal form. 8/2909 useless extension candidates. Maximal degree in co-relation 14281. Up to 2254 conditions per place. [2024-06-21 17:08:52,266 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 87 selfloop transitions, 58 changer transitions 0/150 dead transitions. [2024-06-21 17:08:52,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 150 transitions, 1512 flow [2024-06-21 17:08:52,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:08:52,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:08:52,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 17:08:52,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-21 17:08:52,270 INFO L175 Difference]: Start difference. First operand has 82 places, 107 transitions, 884 flow. Second operand 7 states and 137 transitions. [2024-06-21 17:08:52,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 150 transitions, 1512 flow [2024-06-21 17:08:52,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 150 transitions, 1394 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 17:08:52,293 INFO L231 Difference]: Finished difference. Result has 85 places, 117 transitions, 1038 flow [2024-06-21 17:08:52,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1038, PETRI_PLACES=85, PETRI_TRANSITIONS=117} [2024-06-21 17:08:52,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-21 17:08:52,294 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 117 transitions, 1038 flow [2024-06-21 17:08:52,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:52,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:08:52,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:08:52,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:08:52,294 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:08:52,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:08:52,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1735620604, now seen corresponding path program 4 times [2024-06-21 17:08:52,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:08:52,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799574447] [2024-06-21 17:08:52,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:08:52,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:08:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:08:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:08:54,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:08:54,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799574447] [2024-06-21 17:08:54,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799574447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:08:54,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:08:54,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:08:54,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910121148] [2024-06-21 17:08:54,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:08:54,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:08:54,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:08:54,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:08:54,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:08:54,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:08:54,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 117 transitions, 1038 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:54,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:08:54,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:08:54,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:08:55,363 INFO L124 PetriNetUnfolderBase]: 1865/2897 cut-off events. [2024-06-21 17:08:55,363 INFO L125 PetriNetUnfolderBase]: For 21862/21872 co-relation queries the response was YES. [2024-06-21 17:08:55,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14070 conditions, 2897 events. 1865/2897 cut-off events. For 21862/21872 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14782 event pairs, 465 based on Foata normal form. 14/2895 useless extension candidates. Maximal degree in co-relation 14034. Up to 2247 conditions per place. [2024-06-21 17:08:55,380 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 83 selfloop transitions, 60 changer transitions 0/148 dead transitions. [2024-06-21 17:08:55,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 148 transitions, 1476 flow [2024-06-21 17:08:55,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:08:55,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:08:55,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 17:08:55,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-21 17:08:55,382 INFO L175 Difference]: Start difference. First operand has 85 places, 117 transitions, 1038 flow. Second operand 7 states and 134 transitions. [2024-06-21 17:08:55,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 148 transitions, 1476 flow [2024-06-21 17:08:55,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 148 transitions, 1385 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-21 17:08:55,413 INFO L231 Difference]: Finished difference. Result has 90 places, 117 transitions, 1077 flow [2024-06-21 17:08:55,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=947, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1077, PETRI_PLACES=90, PETRI_TRANSITIONS=117} [2024-06-21 17:08:55,414 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-21 17:08:55,414 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 117 transitions, 1077 flow [2024-06-21 17:08:55,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:55,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:08:55,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:08:55,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:08:55,415 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:08:55,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:08:55,415 INFO L85 PathProgramCache]: Analyzing trace with hash 2028889739, now seen corresponding path program 1 times [2024-06-21 17:08:55,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:08:55,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109108569] [2024-06-21 17:08:55,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:08:55,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:08:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:08:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:08:57,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:08:57,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109108569] [2024-06-21 17:08:57,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109108569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:08:57,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:08:57,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:08:57,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999176630] [2024-06-21 17:08:57,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:08:57,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:08:57,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:08:57,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:08:57,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:08:57,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:08:57,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 117 transitions, 1077 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:57,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:08:57,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:08:57,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:08:58,802 INFO L124 PetriNetUnfolderBase]: 1917/3018 cut-off events. [2024-06-21 17:08:58,802 INFO L125 PetriNetUnfolderBase]: For 24444/24452 co-relation queries the response was YES. [2024-06-21 17:08:58,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14868 conditions, 3018 events. 1917/3018 cut-off events. For 24444/24452 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15783 event pairs, 487 based on Foata normal form. 16/3027 useless extension candidates. Maximal degree in co-relation 14829. Up to 2291 conditions per place. [2024-06-21 17:08:58,820 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 94 selfloop transitions, 63 changer transitions 0/162 dead transitions. [2024-06-21 17:08:58,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 162 transitions, 1665 flow [2024-06-21 17:08:58,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:08:58,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:08:58,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 17:08:58,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-21 17:08:58,822 INFO L175 Difference]: Start difference. First operand has 90 places, 117 transitions, 1077 flow. Second operand 7 states and 142 transitions. [2024-06-21 17:08:58,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 162 transitions, 1665 flow [2024-06-21 17:08:58,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 162 transitions, 1501 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 17:08:58,852 INFO L231 Difference]: Finished difference. Result has 90 places, 123 transitions, 1140 flow [2024-06-21 17:08:58,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1140, PETRI_PLACES=90, PETRI_TRANSITIONS=123} [2024-06-21 17:08:58,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-21 17:08:58,852 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 123 transitions, 1140 flow [2024-06-21 17:08:58,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:08:58,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:08:58,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:08:58,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:08:58,853 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:08:58,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:08:58,853 INFO L85 PathProgramCache]: Analyzing trace with hash 826876029, now seen corresponding path program 2 times [2024-06-21 17:08:58,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:08:58,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408217882] [2024-06-21 17:08:58,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:08:58,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:08:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:09:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:09:01,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:09:01,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408217882] [2024-06-21 17:09:01,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408217882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:09:01,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:09:01,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:09:01,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650517254] [2024-06-21 17:09:01,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:09:01,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:09:01,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:09:01,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:09:01,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:09:01,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:09:01,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 123 transitions, 1140 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:09:01,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:09:01,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:09:01,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:09:02,947 INFO L124 PetriNetUnfolderBase]: 1957/3081 cut-off events. [2024-06-21 17:09:02,948 INFO L125 PetriNetUnfolderBase]: For 26966/26972 co-relation queries the response was YES. [2024-06-21 17:09:02,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15275 conditions, 3081 events. 1957/3081 cut-off events. For 26966/26972 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16270 event pairs, 480 based on Foata normal form. 12/3086 useless extension candidates. Maximal degree in co-relation 15236. Up to 2326 conditions per place. [2024-06-21 17:09:02,964 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 97 selfloop transitions, 68 changer transitions 0/170 dead transitions. [2024-06-21 17:09:02,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 170 transitions, 1754 flow [2024-06-21 17:09:02,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:09:02,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:09:02,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 17:09:02,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 17:09:02,966 INFO L175 Difference]: Start difference. First operand has 90 places, 123 transitions, 1140 flow. Second operand 8 states and 154 transitions. [2024-06-21 17:09:02,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 170 transitions, 1754 flow [2024-06-21 17:09:02,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 170 transitions, 1539 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 17:09:02,997 INFO L231 Difference]: Finished difference. Result has 92 places, 129 transitions, 1163 flow [2024-06-21 17:09:02,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1163, PETRI_PLACES=92, PETRI_TRANSITIONS=129} [2024-06-21 17:09:02,997 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-21 17:09:02,997 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 129 transitions, 1163 flow [2024-06-21 17:09:02,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:09:02,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:09:02,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:09:02,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:09:02,998 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:09:02,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:09:02,999 INFO L85 PathProgramCache]: Analyzing trace with hash 156196545, now seen corresponding path program 3 times [2024-06-21 17:09:02,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:09:02,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479923778] [2024-06-21 17:09:02,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:09:02,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:09:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:09:05,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:09:05,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:09:05,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479923778] [2024-06-21 17:09:05,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479923778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:09:05,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:09:05,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:09:05,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679471086] [2024-06-21 17:09:05,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:09:05,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:09:05,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:09:05,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:09:05,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:09:05,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:09:05,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 129 transitions, 1163 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:09:05,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:09:05,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:09:05,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:09:07,058 INFO L124 PetriNetUnfolderBase]: 2001/3164 cut-off events. [2024-06-21 17:09:07,059 INFO L125 PetriNetUnfolderBase]: For 28564/28572 co-relation queries the response was YES. [2024-06-21 17:09:07,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15766 conditions, 3164 events. 2001/3164 cut-off events. For 28564/28572 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16889 event pairs, 469 based on Foata normal form. 12/3162 useless extension candidates. Maximal degree in co-relation 15727. Up to 2364 conditions per place. [2024-06-21 17:09:07,075 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 78 changer transitions 0/179 dead transitions. [2024-06-21 17:09:07,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 179 transitions, 1811 flow [2024-06-21 17:09:07,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:09:07,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:09:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 17:09:07,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 17:09:07,077 INFO L175 Difference]: Start difference. First operand has 92 places, 129 transitions, 1163 flow. Second operand 9 states and 168 transitions. [2024-06-21 17:09:07,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 179 transitions, 1811 flow [2024-06-21 17:09:07,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 179 transitions, 1686 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 17:09:07,108 INFO L231 Difference]: Finished difference. Result has 96 places, 135 transitions, 1289 flow [2024-06-21 17:09:07,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1289, PETRI_PLACES=96, PETRI_TRANSITIONS=135} [2024-06-21 17:09:07,108 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-21 17:09:07,109 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 135 transitions, 1289 flow [2024-06-21 17:09:07,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:09:07,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:09:07,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:09:07,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:09:07,109 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:09:07,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:09:07,110 INFO L85 PathProgramCache]: Analyzing trace with hash 982661727, now seen corresponding path program 4 times [2024-06-21 17:09:07,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:09:07,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656022204] [2024-06-21 17:09:07,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:09:07,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:09:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:09:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:09:09,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:09:09,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656022204] [2024-06-21 17:09:09,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656022204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:09:09,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:09:09,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:09:09,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891434000] [2024-06-21 17:09:09,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:09:09,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:09:09,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:09:09,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:09:09,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:09:09,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:09:09,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 135 transitions, 1289 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:09:09,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:09:09,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:09:09,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:09:11,040 INFO L124 PetriNetUnfolderBase]: 1985/3114 cut-off events. [2024-06-21 17:09:11,040 INFO L125 PetriNetUnfolderBase]: For 31944/31948 co-relation queries the response was YES. [2024-06-21 17:09:11,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15805 conditions, 3114 events. 1985/3114 cut-off events. For 31944/31948 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 16355 event pairs, 503 based on Foata normal form. 8/3100 useless extension candidates. Maximal degree in co-relation 15765. Up to 2351 conditions per place. [2024-06-21 17:09:11,059 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 89 selfloop transitions, 76 changer transitions 0/170 dead transitions. [2024-06-21 17:09:11,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 170 transitions, 1753 flow [2024-06-21 17:09:11,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:09:11,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:09:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 17:09:11,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 17:09:11,061 INFO L175 Difference]: Start difference. First operand has 96 places, 135 transitions, 1289 flow. Second operand 8 states and 150 transitions. [2024-06-21 17:09:11,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 170 transitions, 1753 flow [2024-06-21 17:09:11,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 170 transitions, 1530 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 17:09:11,099 INFO L231 Difference]: Finished difference. Result has 97 places, 135 transitions, 1229 flow [2024-06-21 17:09:11,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1229, PETRI_PLACES=97, PETRI_TRANSITIONS=135} [2024-06-21 17:09:11,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-21 17:09:11,100 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 135 transitions, 1229 flow [2024-06-21 17:09:11,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:09:11,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:09:11,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:09:11,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:09:11,101 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:09:11,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:09:11,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2030614550, now seen corresponding path program 1 times [2024-06-21 17:09:11,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:09:11,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609525065] [2024-06-21 17:09:11,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:09:11,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:09:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:09:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:09:13,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:09:13,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609525065] [2024-06-21 17:09:13,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609525065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:09:13,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:09:13,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:09:13,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664760572] [2024-06-21 17:09:13,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:09:13,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:09:13,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:09:13,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:09:13,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:09:13,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:09:13,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 135 transitions, 1229 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:09:13,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:09:13,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:09:13,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:09:14,944 INFO L124 PetriNetUnfolderBase]: 1977/3127 cut-off events. [2024-06-21 17:09:14,944 INFO L125 PetriNetUnfolderBase]: For 33148/33150 co-relation queries the response was YES. [2024-06-21 17:09:14,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15731 conditions, 3127 events. 1977/3127 cut-off events. For 33148/33150 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16565 event pairs, 567 based on Foata normal form. 4/3128 useless extension candidates. Maximal degree in co-relation 15690. Up to 2867 conditions per place. [2024-06-21 17:09:14,960 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 149 selfloop transitions, 16 changer transitions 0/170 dead transitions. [2024-06-21 17:09:14,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 170 transitions, 1692 flow [2024-06-21 17:09:14,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:09:14,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:09:14,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:09:14,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 17:09:14,962 INFO L175 Difference]: Start difference. First operand has 97 places, 135 transitions, 1229 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:09:14,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 170 transitions, 1692 flow [2024-06-21 17:09:14,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 170 transitions, 1484 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 17:09:14,992 INFO L231 Difference]: Finished difference. Result has 98 places, 140 transitions, 1119 flow [2024-06-21 17:09:14,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1119, PETRI_PLACES=98, PETRI_TRANSITIONS=140} [2024-06-21 17:09:14,993 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-21 17:09:14,993 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 140 transitions, 1119 flow [2024-06-21 17:09:14,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:09:14,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:09:14,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:09:14,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:09:14,993 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:09:14,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:09:14,993 INFO L85 PathProgramCache]: Analyzing trace with hash -877496395, now seen corresponding path program 1 times [2024-06-21 17:09:14,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:09:14,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060363243] [2024-06-21 17:09:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:09:14,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:09:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:09:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:09:16,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:09:16,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060363243] [2024-06-21 17:09:16,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060363243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:09:16,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:09:16,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:09:16,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597003255] [2024-06-21 17:09:16,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:09:16,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:09:16,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:09:16,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:09:16,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:09:16,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:09:16,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 140 transitions, 1119 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:09:16,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:09:16,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:09:16,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:09:16,987 INFO L124 PetriNetUnfolderBase]: 1840/2942 cut-off events. [2024-06-21 17:09:16,988 INFO L125 PetriNetUnfolderBase]: For 34113/34136 co-relation queries the response was YES. [2024-06-21 17:09:16,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14899 conditions, 2942 events. 1840/2942 cut-off events. For 34113/34136 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15866 event pairs, 518 based on Foata normal form. 12/2935 useless extension candidates. Maximal degree in co-relation 14856. Up to 2657 conditions per place. [2024-06-21 17:09:17,003 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 133 selfloop transitions, 8 changer transitions 0/154 dead transitions. [2024-06-21 17:09:17,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 154 transitions, 1457 flow [2024-06-21 17:09:17,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:09:17,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:09:17,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-21 17:09:17,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 17:09:17,005 INFO L175 Difference]: Start difference. First operand has 98 places, 140 transitions, 1119 flow. Second operand 5 states and 89 transitions. [2024-06-21 17:09:17,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 154 transitions, 1457 flow [2024-06-21 17:09:17,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 154 transitions, 1406 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 17:09:17,040 INFO L231 Difference]: Finished difference. Result has 98 places, 143 transitions, 1122 flow [2024-06-21 17:09:17,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1122, PETRI_PLACES=98, PETRI_TRANSITIONS=143} [2024-06-21 17:09:17,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-21 17:09:17,041 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 143 transitions, 1122 flow [2024-06-21 17:09:17,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:09:17,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:09:17,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:09:17,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:09:17,041 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:09:17,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:09:17,041 INFO L85 PathProgramCache]: Analyzing trace with hash -254971351, now seen corresponding path program 1 times [2024-06-21 17:09:17,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:09:17,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112635055] [2024-06-21 17:09:17,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:09:17,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:09:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:09:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:09:19,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:09:19,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112635055] [2024-06-21 17:09:19,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112635055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:09:19,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:09:19,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:09:19,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663622465] [2024-06-21 17:09:19,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:09:19,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:09:19,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:09:19,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:09:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:09:19,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:09:19,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 143 transitions, 1122 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:09:19,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:09:19,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:09:19,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:09:20,143 INFO L124 PetriNetUnfolderBase]: 1991/3147 cut-off events. [2024-06-21 17:09:20,143 INFO L125 PetriNetUnfolderBase]: For 37070/37085 co-relation queries the response was YES. [2024-06-21 17:09:20,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16046 conditions, 3147 events. 1991/3147 cut-off events. For 37070/37085 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16704 event pairs, 344 based on Foata normal form. 16/3159 useless extension candidates. Maximal degree in co-relation 16002. Up to 2635 conditions per place. [2024-06-21 17:09:20,168 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 142 selfloop transitions, 32 changer transitions 0/179 dead transitions. [2024-06-21 17:09:20,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 179 transitions, 1676 flow [2024-06-21 17:09:20,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:09:20,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:09:20,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 17:09:20,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-21 17:09:20,169 INFO L175 Difference]: Start difference. First operand has 98 places, 143 transitions, 1122 flow. Second operand 7 states and 131 transitions. [2024-06-21 17:09:20,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 179 transitions, 1676 flow [2024-06-21 17:09:20,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 179 transitions, 1644 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 17:09:20,213 INFO L231 Difference]: Finished difference. Result has 102 places, 147 transitions, 1213 flow [2024-06-21 17:09:20,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1090, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1213, PETRI_PLACES=102, PETRI_TRANSITIONS=147} [2024-06-21 17:09:20,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-21 17:09:20,214 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 147 transitions, 1213 flow [2024-06-21 17:09:20,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:09:20,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:09:20,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:09:20,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:09:20,215 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:09:20,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:09:20,215 INFO L85 PathProgramCache]: Analyzing trace with hash -252114391, now seen corresponding path program 2 times [2024-06-21 17:09:20,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:09:20,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932842142] [2024-06-21 17:09:20,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:09:20,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:09:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:09:22,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:09:22,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:09:22,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932842142] [2024-06-21 17:09:22,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932842142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:09:22,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:09:22,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:09:22,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883800776] [2024-06-21 17:09:22,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:09:22,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:09:22,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:09:22,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:09:22,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:09:22,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:09:22,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 147 transitions, 1213 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:09:22,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:09:22,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:09:22,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:09:23,333 INFO L124 PetriNetUnfolderBase]: 1983/3124 cut-off events. [2024-06-21 17:09:23,334 INFO L125 PetriNetUnfolderBase]: For 40563/40570 co-relation queries the response was YES. [2024-06-21 17:09:23,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16386 conditions, 3124 events. 1983/3124 cut-off events. For 40563/40570 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16495 event pairs, 462 based on Foata normal form. 8/3128 useless extension candidates. Maximal degree in co-relation 16341. Up to 2731 conditions per place. [2024-06-21 17:09:23,350 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 139 selfloop transitions, 33 changer transitions 0/177 dead transitions. [2024-06-21 17:09:23,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 177 transitions, 1647 flow [2024-06-21 17:09:23,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:09:23,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:09:23,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 17:09:23,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 17:09:23,353 INFO L175 Difference]: Start difference. First operand has 102 places, 147 transitions, 1213 flow. Second operand 7 states and 129 transitions. [2024-06-21 17:09:23,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 177 transitions, 1647 flow [2024-06-21 17:09:23,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 177 transitions, 1583 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 17:09:23,396 INFO L231 Difference]: Finished difference. Result has 106 places, 147 transitions, 1224 flow [2024-06-21 17:09:23,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1224, PETRI_PLACES=106, PETRI_TRANSITIONS=147} [2024-06-21 17:09:23,397 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-21 17:09:23,397 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 147 transitions, 1224 flow [2024-06-21 17:09:23,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:09:23,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:09:23,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:09:23,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:09:23,398 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:09:23,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:09:23,398 INFO L85 PathProgramCache]: Analyzing trace with hash 685824276, now seen corresponding path program 1 times [2024-06-21 17:09:23,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:09:23,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285302872] [2024-06-21 17:09:23,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:09:23,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:09:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:09:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:09:25,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:09:25,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285302872] [2024-06-21 17:09:25,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285302872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:09:25,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:09:25,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:09:25,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578216039] [2024-06-21 17:09:25,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:09:25,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:09:25,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:09:25,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:09:25,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:09:25,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:09:25,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 147 transitions, 1224 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-21 17:09:25,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:09:25,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:09:25,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:09:26,857 INFO L124 PetriNetUnfolderBase]: 2147/3422 cut-off events. [2024-06-21 17:09:26,857 INFO L125 PetriNetUnfolderBase]: For 51018/51023 co-relation queries the response was YES. [2024-06-21 17:09:26,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18094 conditions, 3422 events. 2147/3422 cut-off events. For 51018/51023 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18646 event pairs, 400 based on Foata normal form. 16/3432 useless extension candidates. Maximal degree in co-relation 18047. Up to 1929 conditions per place. [2024-06-21 17:09:26,912 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 117 selfloop transitions, 73 changer transitions 0/195 dead transitions. [2024-06-21 17:09:26,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 195 transitions, 1880 flow [2024-06-21 17:09:26,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:09:26,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:09:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 17:09:26,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-21 17:09:26,914 INFO L175 Difference]: Start difference. First operand has 106 places, 147 transitions, 1224 flow. Second operand 8 states and 158 transitions. [2024-06-21 17:09:26,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 195 transitions, 1880 flow [2024-06-21 17:09:26,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 195 transitions, 1805 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:09:26,953 INFO L231 Difference]: Finished difference. Result has 108 places, 149 transitions, 1339 flow [2024-06-21 17:09:26,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1339, PETRI_PLACES=108, PETRI_TRANSITIONS=149} [2024-06-21 17:09:26,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-21 17:09:26,954 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 149 transitions, 1339 flow [2024-06-21 17:09:26,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-21 17:09:26,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:09:26,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:09:26,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:09:26,954 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:09:26,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:09:26,955 INFO L85 PathProgramCache]: Analyzing trace with hash -765943494, now seen corresponding path program 2 times [2024-06-21 17:09:26,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:09:26,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134200672] [2024-06-21 17:09:26,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:09:26,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:09:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:09:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:09:29,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:09:29,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134200672] [2024-06-21 17:09:29,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134200672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:09:29,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:09:29,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:09:29,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520700287] [2024-06-21 17:09:29,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:09:29,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:09:29,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:09:29,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:09:29,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:09:29,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:09:29,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 149 transitions, 1339 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-21 17:09:29,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:09:29,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:09:29,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:09:30,947 INFO L124 PetriNetUnfolderBase]: 2255/3611 cut-off events. [2024-06-21 17:09:30,947 INFO L125 PetriNetUnfolderBase]: For 58542/58551 co-relation queries the response was YES. [2024-06-21 17:09:30,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19346 conditions, 3611 events. 2255/3611 cut-off events. For 58542/58551 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20222 event pairs, 538 based on Foata normal form. 28/3633 useless extension candidates. Maximal degree in co-relation 19298. Up to 2599 conditions per place. [2024-06-21 17:09:30,966 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 109 selfloop transitions, 78 changer transitions 0/192 dead transitions. [2024-06-21 17:09:30,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 192 transitions, 1893 flow [2024-06-21 17:09:30,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:09:30,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:09:30,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 17:09:30,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-21 17:09:30,968 INFO L175 Difference]: Start difference. First operand has 108 places, 149 transitions, 1339 flow. Second operand 8 states and 155 transitions. [2024-06-21 17:09:30,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 192 transitions, 1893 flow [2024-06-21 17:09:31,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 192 transitions, 1807 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 17:09:31,015 INFO L231 Difference]: Finished difference. Result has 112 places, 151 transitions, 1457 flow [2024-06-21 17:09:31,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1457, PETRI_PLACES=112, PETRI_TRANSITIONS=151} [2024-06-21 17:09:31,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-21 17:09:31,016 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 151 transitions, 1457 flow [2024-06-21 17:09:31,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-21 17:09:31,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:09:31,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:09:31,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:09:31,016 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:09:31,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:09:31,017 INFO L85 PathProgramCache]: Analyzing trace with hash -765947214, now seen corresponding path program 3 times [2024-06-21 17:09:31,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:09:31,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552050208] [2024-06-21 17:09:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:09:31,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:09:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:09:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:09:33,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:09:33,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552050208] [2024-06-21 17:09:33,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552050208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:09:33,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:09:33,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:09:33,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328534625] [2024-06-21 17:09:33,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:09:33,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:09:33,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:09:33,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:09:33,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:09:33,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:09:33,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 151 transitions, 1457 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-21 17:09:33,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:09:33,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:09:33,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:09:34,673 INFO L124 PetriNetUnfolderBase]: 2323/3737 cut-off events. [2024-06-21 17:09:34,673 INFO L125 PetriNetUnfolderBase]: For 63444/63449 co-relation queries the response was YES. [2024-06-21 17:09:34,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20672 conditions, 3737 events. 2323/3737 cut-off events. For 63444/63449 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21160 event pairs, 554 based on Foata normal form. 16/3747 useless extension candidates. Maximal degree in co-relation 20622. Up to 2571 conditions per place. [2024-06-21 17:09:34,697 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 112 selfloop transitions, 79 changer transitions 0/196 dead transitions. [2024-06-21 17:09:34,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 196 transitions, 2023 flow [2024-06-21 17:09:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:09:34,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:09:34,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 17:09:34,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-21 17:09:34,699 INFO L175 Difference]: Start difference. First operand has 112 places, 151 transitions, 1457 flow. Second operand 8 states and 158 transitions. [2024-06-21 17:09:34,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 196 transitions, 2023 flow [2024-06-21 17:09:34,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 196 transitions, 1857 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 17:09:34,766 INFO L231 Difference]: Finished difference. Result has 114 places, 152 transitions, 1479 flow [2024-06-21 17:09:34,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1479, PETRI_PLACES=114, PETRI_TRANSITIONS=152} [2024-06-21 17:09:34,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-21 17:09:34,766 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 152 transitions, 1479 flow [2024-06-21 17:09:34,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-21 17:09:34,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:09:34,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:09:34,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:09:34,767 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:09:34,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:09:34,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1400196430, now seen corresponding path program 4 times [2024-06-21 17:09:34,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:09:34,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932215440] [2024-06-21 17:09:34,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:09:34,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:09:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:09:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:09:37,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:09:37,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932215440] [2024-06-21 17:09:37,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932215440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:09:37,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:09:37,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:09:37,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014000709] [2024-06-21 17:09:37,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:09:37,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:09:37,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:09:37,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:09:37,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:09:37,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:09:37,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 152 transitions, 1479 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-21 17:09:37,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:09:37,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:09:37,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:09:38,651 INFO L124 PetriNetUnfolderBase]: 2459/4008 cut-off events. [2024-06-21 17:09:38,651 INFO L125 PetriNetUnfolderBase]: For 72578/72589 co-relation queries the response was YES. [2024-06-21 17:09:38,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22102 conditions, 4008 events. 2459/4008 cut-off events. For 72578/72589 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 23398 event pairs, 457 based on Foata normal form. 24/4026 useless extension candidates. Maximal degree in co-relation 22051. Up to 2663 conditions per place. [2024-06-21 17:09:38,678 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 118 selfloop transitions, 81 changer transitions 0/204 dead transitions. [2024-06-21 17:09:38,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 204 transitions, 2193 flow [2024-06-21 17:09:38,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:09:38,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:09:38,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 17:09:38,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-21 17:09:38,680 INFO L175 Difference]: Start difference. First operand has 114 places, 152 transitions, 1479 flow. Second operand 8 states and 164 transitions. [2024-06-21 17:09:38,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 204 transitions, 2193 flow [2024-06-21 17:09:38,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 204 transitions, 2023 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 17:09:38,754 INFO L231 Difference]: Finished difference. Result has 116 places, 154 transitions, 1527 flow [2024-06-21 17:09:38,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1527, PETRI_PLACES=116, PETRI_TRANSITIONS=154} [2024-06-21 17:09:38,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-21 17:09:38,754 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 154 transitions, 1527 flow [2024-06-21 17:09:38,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-21 17:09:38,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:09:38,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:09:38,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:09:38,755 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:09:38,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:09:38,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1400048560, now seen corresponding path program 5 times [2024-06-21 17:09:38,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:09:38,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804304565] [2024-06-21 17:09:38,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:09:38,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:09:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:09:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:09:41,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:09:41,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804304565] [2024-06-21 17:09:41,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804304565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:09:41,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:09:41,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:09:41,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966775083] [2024-06-21 17:09:41,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:09:41,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:09:41,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:09:41,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:09:41,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:09:41,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:09:41,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 154 transitions, 1527 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-21 17:09:41,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:09:41,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:09:41,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:09:42,877 INFO L124 PetriNetUnfolderBase]: 2547/4156 cut-off events. [2024-06-21 17:09:42,877 INFO L125 PetriNetUnfolderBase]: For 79950/79961 co-relation queries the response was YES. [2024-06-21 17:09:42,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22977 conditions, 4156 events. 2547/4156 cut-off events. For 79950/79961 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24492 event pairs, 595 based on Foata normal form. 28/4178 useless extension candidates. Maximal degree in co-relation 22925. Up to 3139 conditions per place. [2024-06-21 17:09:42,903 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 118 selfloop transitions, 78 changer transitions 0/201 dead transitions. [2024-06-21 17:09:42,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 201 transitions, 2117 flow [2024-06-21 17:09:42,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:09:42,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:09:42,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 17:09:42,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-21 17:09:42,905 INFO L175 Difference]: Start difference. First operand has 116 places, 154 transitions, 1527 flow. Second operand 8 states and 159 transitions. [2024-06-21 17:09:42,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 201 transitions, 2117 flow [2024-06-21 17:09:42,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 201 transitions, 2010 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 17:09:42,976 INFO L231 Difference]: Finished difference. Result has 120 places, 155 transitions, 1613 flow [2024-06-21 17:09:42,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1613, PETRI_PLACES=120, PETRI_TRANSITIONS=155} [2024-06-21 17:09:42,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-21 17:09:42,977 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 155 transitions, 1613 flow [2024-06-21 17:09:42,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-21 17:09:42,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:09:42,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:09:42,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:09:42,977 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:09:42,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:09:42,977 INFO L85 PathProgramCache]: Analyzing trace with hash 58959260, now seen corresponding path program 6 times [2024-06-21 17:09:42,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:09:42,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73707108] [2024-06-21 17:09:42,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:09:42,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:09:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:09:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:09:45,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:09:45,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73707108] [2024-06-21 17:09:45,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73707108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:09:45,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:09:45,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:09:45,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669170138] [2024-06-21 17:09:45,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:09:45,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:09:45,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:09:45,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:09:45,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:09:45,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:09:45,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 155 transitions, 1613 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:09:45,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:09:45,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:09:45,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:09:47,434 INFO L124 PetriNetUnfolderBase]: 2635/4279 cut-off events. [2024-06-21 17:09:47,434 INFO L125 PetriNetUnfolderBase]: For 86418/86427 co-relation queries the response was YES. [2024-06-21 17:09:47,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24172 conditions, 4279 events. 2635/4279 cut-off events. For 86418/86427 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 25336 event pairs, 614 based on Foata normal form. 24/4297 useless extension candidates. Maximal degree in co-relation 24118. Up to 3287 conditions per place. [2024-06-21 17:09:47,459 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 122 selfloop transitions, 77 changer transitions 0/204 dead transitions. [2024-06-21 17:09:47,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 204 transitions, 2217 flow [2024-06-21 17:09:47,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:09:47,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:09:47,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 17:09:47,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 17:09:47,461 INFO L175 Difference]: Start difference. First operand has 120 places, 155 transitions, 1613 flow. Second operand 9 states and 171 transitions. [2024-06-21 17:09:47,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 204 transitions, 2217 flow [2024-06-21 17:09:47,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 204 transitions, 2052 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 17:09:47,541 INFO L231 Difference]: Finished difference. Result has 123 places, 156 transitions, 1641 flow [2024-06-21 17:09:47,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1641, PETRI_PLACES=123, PETRI_TRANSITIONS=156} [2024-06-21 17:09:47,542 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-21 17:09:47,542 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 156 transitions, 1641 flow [2024-06-21 17:09:47,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:09:47,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:09:47,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:09:47,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:09:47,543 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:09:47,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:09:47,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1610955960, now seen corresponding path program 1 times [2024-06-21 17:09:47,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:09:47,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048759173] [2024-06-21 17:09:47,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:09:47,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:09:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:09:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:09:49,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:09:49,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048759173] [2024-06-21 17:09:49,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048759173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:09:49,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:09:49,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:09:49,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698933098] [2024-06-21 17:09:49,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:09:49,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:09:49,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:09:49,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:09:49,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:09:49,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:09:49,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 156 transitions, 1641 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:09:49,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:09:49,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:09:49,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:09:50,315 INFO L124 PetriNetUnfolderBase]: 2470/4062 cut-off events. [2024-06-21 17:09:50,315 INFO L125 PetriNetUnfolderBase]: For 85490/85511 co-relation queries the response was YES. [2024-06-21 17:09:50,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23233 conditions, 4062 events. 2470/4062 cut-off events. For 85490/85511 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24537 event pairs, 659 based on Foata normal form. 14/4037 useless extension candidates. Maximal degree in co-relation 23178. Up to 3689 conditions per place. [2024-06-21 17:09:50,339 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 152 selfloop transitions, 15 changer transitions 0/182 dead transitions. [2024-06-21 17:09:50,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 182 transitions, 2091 flow [2024-06-21 17:09:50,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:09:50,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:09:50,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 17:09:50,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 17:09:50,340 INFO L175 Difference]: Start difference. First operand has 123 places, 156 transitions, 1641 flow. Second operand 6 states and 110 transitions. [2024-06-21 17:09:50,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 182 transitions, 2091 flow [2024-06-21 17:09:50,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 182 transitions, 1926 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 17:09:50,421 INFO L231 Difference]: Finished difference. Result has 122 places, 161 transitions, 1577 flow [2024-06-21 17:09:50,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1577, PETRI_PLACES=122, PETRI_TRANSITIONS=161} [2024-06-21 17:09:50,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-21 17:09:50,422 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 161 transitions, 1577 flow [2024-06-21 17:09:50,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:09:50,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:09:50,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:09:50,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:09:50,422 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:09:50,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:09:50,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1530735204, now seen corresponding path program 7 times [2024-06-21 17:09:50,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:09:50,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465585688] [2024-06-21 17:09:50,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:09:50,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:09:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:09:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:09:53,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:09:53,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465585688] [2024-06-21 17:09:53,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465585688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:09:53,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:09:53,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:09:53,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630093057] [2024-06-21 17:09:53,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:09:53,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:09:53,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:09:53,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:09:53,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:09:53,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:09:53,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 161 transitions, 1577 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:09:53,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:09:53,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:09:53,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:09:54,881 INFO L124 PetriNetUnfolderBase]: 2711/4388 cut-off events. [2024-06-21 17:09:54,881 INFO L125 PetriNetUnfolderBase]: For 94877/94881 co-relation queries the response was YES. [2024-06-21 17:09:54,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24645 conditions, 4388 events. 2711/4388 cut-off events. For 94877/94881 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 26083 event pairs, 628 based on Foata normal form. 22/4388 useless extension candidates. Maximal degree in co-relation 24589. Up to 3425 conditions per place. [2024-06-21 17:09:54,916 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 123 selfloop transitions, 79 changer transitions 0/207 dead transitions. [2024-06-21 17:09:54,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 207 transitions, 2195 flow [2024-06-21 17:09:54,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:09:54,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:09:54,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 17:09:54,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 17:09:54,919 INFO L175 Difference]: Start difference. First operand has 122 places, 161 transitions, 1577 flow. Second operand 9 states and 169 transitions. [2024-06-21 17:09:54,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 207 transitions, 2195 flow [2024-06-21 17:09:55,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 207 transitions, 2142 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 17:09:55,016 INFO L231 Difference]: Finished difference. Result has 127 places, 162 transitions, 1723 flow [2024-06-21 17:09:55,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1723, PETRI_PLACES=127, PETRI_TRANSITIONS=162} [2024-06-21 17:09:55,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-21 17:09:55,018 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 162 transitions, 1723 flow [2024-06-21 17:09:55,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:09:55,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:09:55,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:09:55,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:09:55,019 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:09:55,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:09:55,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1069141838, now seen corresponding path program 8 times [2024-06-21 17:09:55,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:09:55,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014121400] [2024-06-21 17:09:55,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:09:55,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:09:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:09:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:09:57,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:09:57,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014121400] [2024-06-21 17:09:57,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014121400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:09:57,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:09:57,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:09:57,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059283041] [2024-06-21 17:09:57,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:09:57,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:09:57,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:09:57,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:09:57,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:09:57,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:09:57,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 162 transitions, 1723 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:09:57,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:09:57,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:09:57,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:09:59,473 INFO L124 PetriNetUnfolderBase]: 2675/4362 cut-off events. [2024-06-21 17:09:59,473 INFO L125 PetriNetUnfolderBase]: For 94924/94932 co-relation queries the response was YES. [2024-06-21 17:09:59,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24504 conditions, 4362 events. 2675/4362 cut-off events. For 94924/94932 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 26139 event pairs, 580 based on Foata normal form. 26/4374 useless extension candidates. Maximal degree in co-relation 24447. Up to 3369 conditions per place. [2024-06-21 17:09:59,502 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 128 selfloop transitions, 81 changer transitions 0/214 dead transitions. [2024-06-21 17:09:59,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 214 transitions, 2349 flow [2024-06-21 17:09:59,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:09:59,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:09:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 17:09:59,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 17:09:59,504 INFO L175 Difference]: Start difference. First operand has 127 places, 162 transitions, 1723 flow. Second operand 10 states and 185 transitions. [2024-06-21 17:09:59,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 214 transitions, 2349 flow [2024-06-21 17:09:59,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 214 transitions, 2168 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 17:09:59,619 INFO L231 Difference]: Finished difference. Result has 130 places, 162 transitions, 1713 flow [2024-06-21 17:09:59,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1713, PETRI_PLACES=130, PETRI_TRANSITIONS=162} [2024-06-21 17:09:59,620 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-21 17:09:59,620 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 162 transitions, 1713 flow [2024-06-21 17:09:59,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:09:59,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:09:59,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:09:59,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:09:59,621 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:09:59,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:09:59,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1530519723, now seen corresponding path program 1 times [2024-06-21 17:09:59,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:09:59,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397448111] [2024-06-21 17:09:59,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:09:59,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:09:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:02,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:02,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:02,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397448111] [2024-06-21 17:10:02,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397448111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:02,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:02,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:10:02,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972524511] [2024-06-21 17:10:02,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:02,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:10:02,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:02,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:10:02,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:10:02,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:02,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 162 transitions, 1713 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:02,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:02,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:02,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:04,468 INFO L124 PetriNetUnfolderBase]: 2695/4359 cut-off events. [2024-06-21 17:10:04,468 INFO L125 PetriNetUnfolderBase]: For 92816/92820 co-relation queries the response was YES. [2024-06-21 17:10:04,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24656 conditions, 4359 events. 2695/4359 cut-off events. For 92816/92820 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25853 event pairs, 622 based on Foata normal form. 6/4339 useless extension candidates. Maximal degree in co-relation 24598. Up to 3533 conditions per place. [2024-06-21 17:10:04,499 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 118 selfloop transitions, 84 changer transitions 0/207 dead transitions. [2024-06-21 17:10:04,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 207 transitions, 2345 flow [2024-06-21 17:10:04,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:10:04,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:10:04,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 17:10:04,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 17:10:04,500 INFO L175 Difference]: Start difference. First operand has 130 places, 162 transitions, 1713 flow. Second operand 9 states and 164 transitions. [2024-06-21 17:10:04,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 207 transitions, 2345 flow [2024-06-21 17:10:04,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 207 transitions, 2147 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 17:10:04,596 INFO L231 Difference]: Finished difference. Result has 131 places, 168 transitions, 1790 flow [2024-06-21 17:10:04,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1521, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1790, PETRI_PLACES=131, PETRI_TRANSITIONS=168} [2024-06-21 17:10:04,597 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-21 17:10:04,597 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 168 transitions, 1790 flow [2024-06-21 17:10:04,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:04,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:04,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:04,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:10:04,597 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:04,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:04,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1239448631, now seen corresponding path program 2 times [2024-06-21 17:10:04,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:04,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871546580] [2024-06-21 17:10:04,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:04,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:07,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:07,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871546580] [2024-06-21 17:10:07,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871546580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:07,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:07,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:10:07,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916153099] [2024-06-21 17:10:07,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:07,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:10:07,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:07,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:10:07,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:10:07,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:07,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 168 transitions, 1790 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:07,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:07,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:07,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:09,560 INFO L124 PetriNetUnfolderBase]: 2737/4432 cut-off events. [2024-06-21 17:10:09,561 INFO L125 PetriNetUnfolderBase]: For 99733/99741 co-relation queries the response was YES. [2024-06-21 17:10:09,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25463 conditions, 4432 events. 2737/4432 cut-off events. For 99733/99741 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 26381 event pairs, 606 based on Foata normal form. 10/4418 useless extension candidates. Maximal degree in co-relation 25403. Up to 3579 conditions per place. [2024-06-21 17:10:09,591 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 119 selfloop transitions, 91 changer transitions 0/215 dead transitions. [2024-06-21 17:10:09,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 215 transitions, 2466 flow [2024-06-21 17:10:09,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:10:09,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:10:09,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 17:10:09,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 17:10:09,592 INFO L175 Difference]: Start difference. First operand has 131 places, 168 transitions, 1790 flow. Second operand 9 states and 164 transitions. [2024-06-21 17:10:09,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 215 transitions, 2466 flow [2024-06-21 17:10:09,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 215 transitions, 2246 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 17:10:09,697 INFO L231 Difference]: Finished difference. Result has 135 places, 176 transitions, 1892 flow [2024-06-21 17:10:09,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1580, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1892, PETRI_PLACES=135, PETRI_TRANSITIONS=176} [2024-06-21 17:10:09,698 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-21 17:10:09,698 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 176 transitions, 1892 flow [2024-06-21 17:10:09,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:09,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:09,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:09,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:10:09,698 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:09,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:09,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1495949141, now seen corresponding path program 3 times [2024-06-21 17:10:09,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:09,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127937522] [2024-06-21 17:10:09,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:09,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:12,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:12,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127937522] [2024-06-21 17:10:12,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127937522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:12,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:12,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:10:12,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804365207] [2024-06-21 17:10:12,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:12,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:10:12,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:12,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:10:12,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:10:12,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:12,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 176 transitions, 1892 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:12,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:12,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:12,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:14,186 INFO L124 PetriNetUnfolderBase]: 2729/4419 cut-off events. [2024-06-21 17:10:14,187 INFO L125 PetriNetUnfolderBase]: For 105024/105032 co-relation queries the response was YES. [2024-06-21 17:10:14,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25764 conditions, 4419 events. 2729/4419 cut-off events. For 105024/105032 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 26285 event pairs, 604 based on Foata normal form. 10/4405 useless extension candidates. Maximal degree in co-relation 25702. Up to 3567 conditions per place. [2024-06-21 17:10:14,220 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 120 selfloop transitions, 104 changer transitions 0/229 dead transitions. [2024-06-21 17:10:14,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 229 transitions, 2680 flow [2024-06-21 17:10:14,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:10:14,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:10:14,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 17:10:14,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 17:10:14,222 INFO L175 Difference]: Start difference. First operand has 135 places, 176 transitions, 1892 flow. Second operand 9 states and 164 transitions. [2024-06-21 17:10:14,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 229 transitions, 2680 flow [2024-06-21 17:10:14,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 229 transitions, 2426 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 17:10:14,351 INFO L231 Difference]: Finished difference. Result has 139 places, 190 transitions, 2091 flow [2024-06-21 17:10:14,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1662, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2091, PETRI_PLACES=139, PETRI_TRANSITIONS=190} [2024-06-21 17:10:14,352 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-21 17:10:14,352 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 190 transitions, 2091 flow [2024-06-21 17:10:14,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:14,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:14,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:14,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:10:14,353 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:14,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:14,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1246867241, now seen corresponding path program 4 times [2024-06-21 17:10:14,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:14,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911763885] [2024-06-21 17:10:14,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:14,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:14,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:17,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:17,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911763885] [2024-06-21 17:10:17,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911763885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:17,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:17,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:10:17,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237056078] [2024-06-21 17:10:17,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:17,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:10:17,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:17,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:10:17,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:10:17,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:17,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 190 transitions, 2091 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:17,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:17,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:17,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:18,867 INFO L124 PetriNetUnfolderBase]: 2769/4498 cut-off events. [2024-06-21 17:10:18,868 INFO L125 PetriNetUnfolderBase]: For 110040/110048 co-relation queries the response was YES. [2024-06-21 17:10:18,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26345 conditions, 4498 events. 2769/4498 cut-off events. For 110040/110048 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 26998 event pairs, 522 based on Foata normal form. 10/4482 useless extension candidates. Maximal degree in co-relation 26281. Up to 3373 conditions per place. [2024-06-21 17:10:18,899 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 118 selfloop transitions, 113 changer transitions 0/236 dead transitions. [2024-06-21 17:10:18,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 236 transitions, 2755 flow [2024-06-21 17:10:18,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:10:18,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:10:18,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 17:10:18,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 17:10:18,900 INFO L175 Difference]: Start difference. First operand has 139 places, 190 transitions, 2091 flow. Second operand 9 states and 168 transitions. [2024-06-21 17:10:18,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 236 transitions, 2755 flow [2024-06-21 17:10:19,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 236 transitions, 2546 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 17:10:19,054 INFO L231 Difference]: Finished difference. Result has 145 places, 193 transitions, 2202 flow [2024-06-21 17:10:19,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1886, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2202, PETRI_PLACES=145, PETRI_TRANSITIONS=193} [2024-06-21 17:10:19,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-21 17:10:19,055 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 193 transitions, 2202 flow [2024-06-21 17:10:19,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:19,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:19,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:19,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:10:19,055 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:19,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:19,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1460399564, now seen corresponding path program 2 times [2024-06-21 17:10:19,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:19,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467782229] [2024-06-21 17:10:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:19,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:20,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:20,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467782229] [2024-06-21 17:10:20,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467782229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:20,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:20,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:10:20,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707404705] [2024-06-21 17:10:20,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:20,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:10:20,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:20,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:10:20,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:10:20,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:10:20,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 193 transitions, 2202 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:20,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:20,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:10:20,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:22,022 INFO L124 PetriNetUnfolderBase]: 2610/4364 cut-off events. [2024-06-21 17:10:22,022 INFO L125 PetriNetUnfolderBase]: For 112725/112769 co-relation queries the response was YES. [2024-06-21 17:10:22,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25394 conditions, 4364 events. 2610/4364 cut-off events. For 112725/112769 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 27280 event pairs, 588 based on Foata normal form. 29/4353 useless extension candidates. Maximal degree in co-relation 25328. Up to 3915 conditions per place. [2024-06-21 17:10:22,052 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 176 selfloop transitions, 20 changer transitions 0/211 dead transitions. [2024-06-21 17:10:22,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 211 transitions, 2686 flow [2024-06-21 17:10:22,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:10:22,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:10:22,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 17:10:22,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:10:22,054 INFO L175 Difference]: Start difference. First operand has 145 places, 193 transitions, 2202 flow. Second operand 6 states and 105 transitions. [2024-06-21 17:10:22,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 211 transitions, 2686 flow [2024-06-21 17:10:22,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 211 transitions, 2446 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 17:10:22,196 INFO L231 Difference]: Finished difference. Result has 145 places, 196 transitions, 2060 flow [2024-06-21 17:10:22,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1962, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2060, PETRI_PLACES=145, PETRI_TRANSITIONS=196} [2024-06-21 17:10:22,196 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-21 17:10:22,196 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 196 transitions, 2060 flow [2024-06-21 17:10:22,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:22,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:22,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:22,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:10:22,196 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:22,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:22,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1467059852, now seen corresponding path program 1 times [2024-06-21 17:10:22,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:22,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324637545] [2024-06-21 17:10:22,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:22,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:23,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:23,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324637545] [2024-06-21 17:10:23,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324637545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:23,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:23,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:10:23,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872862970] [2024-06-21 17:10:23,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:23,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:10:23,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:23,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:10:23,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:10:23,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:23,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 196 transitions, 2060 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:23,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:23,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:23,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:24,973 INFO L124 PetriNetUnfolderBase]: 2773/4548 cut-off events. [2024-06-21 17:10:24,973 INFO L125 PetriNetUnfolderBase]: For 116763/116765 co-relation queries the response was YES. [2024-06-21 17:10:24,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25980 conditions, 4548 events. 2773/4548 cut-off events. For 116763/116765 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 27546 event pairs, 670 based on Foata normal form. 2/4547 useless extension candidates. Maximal degree in co-relation 25913. Up to 4238 conditions per place. [2024-06-21 17:10:25,009 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 200 selfloop transitions, 16 changer transitions 0/221 dead transitions. [2024-06-21 17:10:25,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 221 transitions, 2670 flow [2024-06-21 17:10:25,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:10:25,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:10:25,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 17:10:25,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 17:10:25,010 INFO L175 Difference]: Start difference. First operand has 145 places, 196 transitions, 2060 flow. Second operand 6 states and 106 transitions. [2024-06-21 17:10:25,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 221 transitions, 2670 flow [2024-06-21 17:10:25,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 221 transitions, 2594 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 17:10:25,168 INFO L231 Difference]: Finished difference. Result has 147 places, 202 transitions, 2088 flow [2024-06-21 17:10:25,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1984, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2088, PETRI_PLACES=147, PETRI_TRANSITIONS=202} [2024-06-21 17:10:25,169 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-21 17:10:25,169 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 202 transitions, 2088 flow [2024-06-21 17:10:25,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:25,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:25,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:25,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:10:25,169 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:25,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:25,170 INFO L85 PathProgramCache]: Analyzing trace with hash -315525482, now seen corresponding path program 2 times [2024-06-21 17:10:25,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:25,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728572349] [2024-06-21 17:10:25,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:25,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:26,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:26,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728572349] [2024-06-21 17:10:26,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728572349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:26,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:26,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:10:26,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170013322] [2024-06-21 17:10:26,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:26,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:10:26,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:26,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:10:26,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:10:26,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:26,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 202 transitions, 2088 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:26,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:26,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:26,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:27,843 INFO L124 PetriNetUnfolderBase]: 2767/4541 cut-off events. [2024-06-21 17:10:27,843 INFO L125 PetriNetUnfolderBase]: For 121786/121791 co-relation queries the response was YES. [2024-06-21 17:10:27,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26170 conditions, 4541 events. 2767/4541 cut-off events. For 121786/121791 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 27514 event pairs, 669 based on Foata normal form. 4/4541 useless extension candidates. Maximal degree in co-relation 26102. Up to 4233 conditions per place. [2024-06-21 17:10:27,877 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 194 selfloop transitions, 16 changer transitions 0/215 dead transitions. [2024-06-21 17:10:27,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 215 transitions, 2542 flow [2024-06-21 17:10:27,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:10:27,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:10:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-21 17:10:27,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 17:10:27,878 INFO L175 Difference]: Start difference. First operand has 147 places, 202 transitions, 2088 flow. Second operand 6 states and 100 transitions. [2024-06-21 17:10:27,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 215 transitions, 2542 flow [2024-06-21 17:10:28,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 215 transitions, 2492 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-21 17:10:28,034 INFO L231 Difference]: Finished difference. Result has 151 places, 202 transitions, 2076 flow [2024-06-21 17:10:28,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2038, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2076, PETRI_PLACES=151, PETRI_TRANSITIONS=202} [2024-06-21 17:10:28,034 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-21 17:10:28,034 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 202 transitions, 2076 flow [2024-06-21 17:10:28,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:28,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:28,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:28,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:10:28,035 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:28,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:28,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1460384684, now seen corresponding path program 1 times [2024-06-21 17:10:28,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:28,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517173361] [2024-06-21 17:10:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:28,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:30,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:30,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517173361] [2024-06-21 17:10:30,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517173361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:30,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:30,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:10:30,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515493878] [2024-06-21 17:10:30,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:30,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:10:30,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:30,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:10:30,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:10:30,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:10:30,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 202 transitions, 2076 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:30,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:30,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:10:30,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:31,518 INFO L124 PetriNetUnfolderBase]: 2620/4326 cut-off events. [2024-06-21 17:10:31,518 INFO L125 PetriNetUnfolderBase]: For 126847/126886 co-relation queries the response was YES. [2024-06-21 17:10:31,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25241 conditions, 4326 events. 2620/4326 cut-off events. For 126847/126886 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 26576 event pairs, 624 based on Foata normal form. 28/4307 useless extension candidates. Maximal degree in co-relation 25171. Up to 3952 conditions per place. [2024-06-21 17:10:31,553 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 190 selfloop transitions, 10 changer transitions 0/217 dead transitions. [2024-06-21 17:10:31,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 217 transitions, 2540 flow [2024-06-21 17:10:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:10:31,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:10:31,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 17:10:31,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 17:10:31,554 INFO L175 Difference]: Start difference. First operand has 151 places, 202 transitions, 2076 flow. Second operand 6 states and 102 transitions. [2024-06-21 17:10:31,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 217 transitions, 2540 flow [2024-06-21 17:10:31,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 217 transitions, 2490 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:10:31,711 INFO L231 Difference]: Finished difference. Result has 151 places, 204 transitions, 2085 flow [2024-06-21 17:10:31,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2085, PETRI_PLACES=151, PETRI_TRANSITIONS=204} [2024-06-21 17:10:31,712 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-21 17:10:31,712 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 204 transitions, 2085 flow [2024-06-21 17:10:31,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:31,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:31,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:31,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:10:31,712 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:31,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:31,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1588142021, now seen corresponding path program 1 times [2024-06-21 17:10:31,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:31,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920452823] [2024-06-21 17:10:31,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:31,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:33,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:33,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920452823] [2024-06-21 17:10:33,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920452823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:33,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:33,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:10:33,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268103429] [2024-06-21 17:10:33,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:33,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:10:33,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:33,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:10:33,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:10:33,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:33,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 204 transitions, 2085 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:33,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:33,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:33,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:35,112 INFO L124 PetriNetUnfolderBase]: 2834/4650 cut-off events. [2024-06-21 17:10:35,112 INFO L125 PetriNetUnfolderBase]: For 137759/137782 co-relation queries the response was YES. [2024-06-21 17:10:35,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27008 conditions, 4650 events. 2834/4650 cut-off events. For 137759/137782 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 28400 event pairs, 565 based on Foata normal form. 30/4676 useless extension candidates. Maximal degree in co-relation 26938. Up to 4010 conditions per place. [2024-06-21 17:10:35,146 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 196 selfloop transitions, 58 changer transitions 0/259 dead transitions. [2024-06-21 17:10:35,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 259 transitions, 3047 flow [2024-06-21 17:10:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:10:35,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:10:35,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 17:10:35,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 17:10:35,148 INFO L175 Difference]: Start difference. First operand has 151 places, 204 transitions, 2085 flow. Second operand 9 states and 161 transitions. [2024-06-21 17:10:35,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 259 transitions, 3047 flow [2024-06-21 17:10:35,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 259 transitions, 3004 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 17:10:35,308 INFO L231 Difference]: Finished difference. Result has 157 places, 223 transitions, 2409 flow [2024-06-21 17:10:35,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2409, PETRI_PLACES=157, PETRI_TRANSITIONS=223} [2024-06-21 17:10:35,308 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 17:10:35,308 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 223 transitions, 2409 flow [2024-06-21 17:10:35,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:35,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:35,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:35,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:10:35,309 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:35,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:35,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1834418350, now seen corresponding path program 1 times [2024-06-21 17:10:35,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:35,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163335443] [2024-06-21 17:10:35,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:35,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:35,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:38,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:38,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163335443] [2024-06-21 17:10:38,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163335443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:38,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:38,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:10:38,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254056683] [2024-06-21 17:10:38,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:38,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:10:38,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:38,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:10:38,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:10:38,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:38,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 223 transitions, 2409 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:38,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:38,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:38,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:41,067 INFO L124 PetriNetUnfolderBase]: 2930/4838 cut-off events. [2024-06-21 17:10:41,067 INFO L125 PetriNetUnfolderBase]: For 149472/149481 co-relation queries the response was YES. [2024-06-21 17:10:41,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28564 conditions, 4838 events. 2930/4838 cut-off events. For 149472/149481 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 30016 event pairs, 632 based on Foata normal form. 16/4848 useless extension candidates. Maximal degree in co-relation 28492. Up to 3552 conditions per place. [2024-06-21 17:10:41,107 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 188 selfloop transitions, 102 changer transitions 0/295 dead transitions. [2024-06-21 17:10:41,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 295 transitions, 3304 flow [2024-06-21 17:10:41,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:10:41,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:10:41,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 219 transitions. [2024-06-21 17:10:41,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 17:10:41,109 INFO L175 Difference]: Start difference. First operand has 157 places, 223 transitions, 2409 flow. Second operand 12 states and 219 transitions. [2024-06-21 17:10:41,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 295 transitions, 3304 flow [2024-06-21 17:10:41,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 295 transitions, 3196 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 17:10:41,328 INFO L231 Difference]: Finished difference. Result has 167 places, 230 transitions, 2638 flow [2024-06-21 17:10:41,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2638, PETRI_PLACES=167, PETRI_TRANSITIONS=230} [2024-06-21 17:10:41,329 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-21 17:10:41,329 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 230 transitions, 2638 flow [2024-06-21 17:10:41,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:41,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:41,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:41,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:10:41,330 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:41,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:41,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1043339639, now seen corresponding path program 2 times [2024-06-21 17:10:41,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:41,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741239725] [2024-06-21 17:10:41,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:41,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:43,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:43,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741239725] [2024-06-21 17:10:43,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741239725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:43,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:43,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:10:43,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566130346] [2024-06-21 17:10:43,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:43,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:10:43,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:43,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:10:43,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:10:43,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:43,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 230 transitions, 2638 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:43,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:43,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:43,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:44,561 INFO L124 PetriNetUnfolderBase]: 2914/4831 cut-off events. [2024-06-21 17:10:44,562 INFO L125 PetriNetUnfolderBase]: For 150580/150595 co-relation queries the response was YES. [2024-06-21 17:10:44,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28925 conditions, 4831 events. 2914/4831 cut-off events. For 150580/150595 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 30127 event pairs, 614 based on Foata normal form. 20/4847 useless extension candidates. Maximal degree in co-relation 28849. Up to 4172 conditions per place. [2024-06-21 17:10:44,603 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 198 selfloop transitions, 50 changer transitions 0/253 dead transitions. [2024-06-21 17:10:44,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 253 transitions, 3276 flow [2024-06-21 17:10:44,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:10:44,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:10:44,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 17:10:44,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 17:10:44,604 INFO L175 Difference]: Start difference. First operand has 167 places, 230 transitions, 2638 flow. Second operand 7 states and 125 transitions. [2024-06-21 17:10:44,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 253 transitions, 3276 flow [2024-06-21 17:10:44,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 253 transitions, 2978 flow, removed 38 selfloop flow, removed 10 redundant places. [2024-06-21 17:10:44,791 INFO L231 Difference]: Finished difference. Result has 164 places, 230 transitions, 2452 flow [2024-06-21 17:10:44,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2452, PETRI_PLACES=164, PETRI_TRANSITIONS=230} [2024-06-21 17:10:44,791 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-21 17:10:44,792 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 230 transitions, 2452 flow [2024-06-21 17:10:44,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:44,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:44,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:44,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:10:44,792 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:44,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:44,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1171352716, now seen corresponding path program 2 times [2024-06-21 17:10:44,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:44,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486788998] [2024-06-21 17:10:44,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:44,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:48,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:48,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:48,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486788998] [2024-06-21 17:10:48,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486788998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:48,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:48,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:10:48,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996988227] [2024-06-21 17:10:48,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:48,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:10:48,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:48,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:10:48,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:10:48,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:48,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 230 transitions, 2452 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:48,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:48,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:48,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:50,378 INFO L124 PetriNetUnfolderBase]: 3052/5071 cut-off events. [2024-06-21 17:10:50,378 INFO L125 PetriNetUnfolderBase]: For 158308/158316 co-relation queries the response was YES. [2024-06-21 17:10:50,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29496 conditions, 5071 events. 3052/5071 cut-off events. For 158308/158316 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 32114 event pairs, 635 based on Foata normal form. 18/5075 useless extension candidates. Maximal degree in co-relation 29421. Up to 3898 conditions per place. [2024-06-21 17:10:50,419 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 183 selfloop transitions, 126 changer transitions 0/314 dead transitions. [2024-06-21 17:10:50,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 314 transitions, 3511 flow [2024-06-21 17:10:50,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:10:50,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:10:50,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 232 transitions. [2024-06-21 17:10:50,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249084249084249 [2024-06-21 17:10:50,421 INFO L175 Difference]: Start difference. First operand has 164 places, 230 transitions, 2452 flow. Second operand 13 states and 232 transitions. [2024-06-21 17:10:50,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 314 transitions, 3511 flow [2024-06-21 17:10:50,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 314 transitions, 3411 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 17:10:50,634 INFO L231 Difference]: Finished difference. Result has 173 places, 247 transitions, 2858 flow [2024-06-21 17:10:50,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2352, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2858, PETRI_PLACES=173, PETRI_TRANSITIONS=247} [2024-06-21 17:10:50,634 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-21 17:10:50,634 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 247 transitions, 2858 flow [2024-06-21 17:10:50,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:50,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:50,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:50,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:10:50,635 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:50,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:50,635 INFO L85 PathProgramCache]: Analyzing trace with hash -201469778, now seen corresponding path program 3 times [2024-06-21 17:10:50,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:50,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640145749] [2024-06-21 17:10:50,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:50,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:54,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:54,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640145749] [2024-06-21 17:10:54,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640145749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:54,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:54,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:10:54,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011813415] [2024-06-21 17:10:54,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:54,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:10:54,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:54,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:10:54,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:10:54,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:54,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 247 transitions, 2858 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:54,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:54,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:54,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:56,296 INFO L124 PetriNetUnfolderBase]: 3148/5236 cut-off events. [2024-06-21 17:10:56,296 INFO L125 PetriNetUnfolderBase]: For 169965/169969 co-relation queries the response was YES. [2024-06-21 17:10:56,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31084 conditions, 5236 events. 3148/5236 cut-off events. For 169965/169969 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 33513 event pairs, 717 based on Foata normal form. 14/5228 useless extension candidates. Maximal degree in co-relation 31006. Up to 4066 conditions per place. [2024-06-21 17:10:56,342 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 182 selfloop transitions, 121 changer transitions 0/308 dead transitions. [2024-06-21 17:10:56,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 308 transitions, 3726 flow [2024-06-21 17:10:56,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:10:56,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:10:56,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 216 transitions. [2024-06-21 17:10:56,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:10:56,344 INFO L175 Difference]: Start difference. First operand has 173 places, 247 transitions, 2858 flow. Second operand 12 states and 216 transitions. [2024-06-21 17:10:56,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 308 transitions, 3726 flow [2024-06-21 17:10:56,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 308 transitions, 3484 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 17:10:56,596 INFO L231 Difference]: Finished difference. Result has 180 places, 250 transitions, 2953 flow [2024-06-21 17:10:56,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2628, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2953, PETRI_PLACES=180, PETRI_TRANSITIONS=250} [2024-06-21 17:10:56,596 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-21 17:10:56,596 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 250 transitions, 2953 flow [2024-06-21 17:10:56,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:56,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:56,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:56,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:10:56,597 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:10:56,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:56,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1703654906, now seen corresponding path program 4 times [2024-06-21 17:10:56,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:56,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818771010] [2024-06-21 17:10:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:56,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:59,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:59,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818771010] [2024-06-21 17:10:59,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818771010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:59,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:59,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:10:59,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236427899] [2024-06-21 17:10:59,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:59,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:10:59,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:59,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:10:59,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:10:59,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:10:59,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 250 transitions, 2953 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:59,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:59,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:10:59,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:02,362 INFO L124 PetriNetUnfolderBase]: 3176/5327 cut-off events. [2024-06-21 17:11:02,362 INFO L125 PetriNetUnfolderBase]: For 166601/166609 co-relation queries the response was YES. [2024-06-21 17:11:02,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30702 conditions, 5327 events. 3176/5327 cut-off events. For 166601/166609 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 34438 event pairs, 675 based on Foata normal form. 18/5331 useless extension candidates. Maximal degree in co-relation 30621. Up to 4118 conditions per place. [2024-06-21 17:11:02,409 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 188 selfloop transitions, 123 changer transitions 0/316 dead transitions. [2024-06-21 17:11:02,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 316 transitions, 3808 flow [2024-06-21 17:11:02,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:11:02,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:11:02,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 234 transitions. [2024-06-21 17:11:02,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:11:02,410 INFO L175 Difference]: Start difference. First operand has 180 places, 250 transitions, 2953 flow. Second operand 13 states and 234 transitions. [2024-06-21 17:11:02,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 316 transitions, 3808 flow [2024-06-21 17:11:02,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 316 transitions, 3543 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 17:11:02,724 INFO L231 Difference]: Finished difference. Result has 186 places, 251 transitions, 2966 flow [2024-06-21 17:11:02,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2688, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2966, PETRI_PLACES=186, PETRI_TRANSITIONS=251} [2024-06-21 17:11:02,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-21 17:11:02,724 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 251 transitions, 2966 flow [2024-06-21 17:11:02,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:02,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:02,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:02,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:11:02,725 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:02,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:02,725 INFO L85 PathProgramCache]: Analyzing trace with hash -574996306, now seen corresponding path program 5 times [2024-06-21 17:11:02,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:02,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396967339] [2024-06-21 17:11:02,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:02,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:05,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:05,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396967339] [2024-06-21 17:11:05,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396967339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:05,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:05,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:11:05,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721931716] [2024-06-21 17:11:05,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:05,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:11:05,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:05,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:11:05,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:11:05,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:05,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 251 transitions, 2966 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:05,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:05,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:05,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:08,271 INFO L124 PetriNetUnfolderBase]: 3156/5295 cut-off events. [2024-06-21 17:11:08,271 INFO L125 PetriNetUnfolderBase]: For 162293/162301 co-relation queries the response was YES. [2024-06-21 17:11:08,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30192 conditions, 5295 events. 3156/5295 cut-off events. For 162293/162301 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 34177 event pairs, 619 based on Foata normal form. 18/5299 useless extension candidates. Maximal degree in co-relation 30109. Up to 3120 conditions per place. [2024-06-21 17:11:08,313 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 169 selfloop transitions, 139 changer transitions 0/313 dead transitions. [2024-06-21 17:11:08,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 313 transitions, 3722 flow [2024-06-21 17:11:08,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:11:08,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:11:08,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 216 transitions. [2024-06-21 17:11:08,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:11:08,315 INFO L175 Difference]: Start difference. First operand has 186 places, 251 transitions, 2966 flow. Second operand 12 states and 216 transitions. [2024-06-21 17:11:08,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 313 transitions, 3722 flow [2024-06-21 17:11:08,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 313 transitions, 3277 flow, removed 15 selfloop flow, removed 14 redundant places. [2024-06-21 17:11:08,575 INFO L231 Difference]: Finished difference. Result has 183 places, 250 transitions, 2733 flow [2024-06-21 17:11:08,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2451, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2733, PETRI_PLACES=183, PETRI_TRANSITIONS=250} [2024-06-21 17:11:08,576 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-21 17:11:08,576 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 250 transitions, 2733 flow [2024-06-21 17:11:08,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:08,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:08,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:08,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:11:08,576 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:08,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:08,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1032240089, now seen corresponding path program 3 times [2024-06-21 17:11:08,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:08,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218245680] [2024-06-21 17:11:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:08,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:10,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:10,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218245680] [2024-06-21 17:11:10,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218245680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:10,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:10,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:11:10,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238798871] [2024-06-21 17:11:10,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:10,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:11:10,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:10,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:11:10,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:11:10,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:10,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 250 transitions, 2733 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:10,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:10,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:10,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:12,238 INFO L124 PetriNetUnfolderBase]: 3164/5321 cut-off events. [2024-06-21 17:11:12,238 INFO L125 PetriNetUnfolderBase]: For 159045/159078 co-relation queries the response was YES. [2024-06-21 17:11:12,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29586 conditions, 5321 events. 3164/5321 cut-off events. For 159045/159078 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 34564 event pairs, 701 based on Foata normal form. 20/5322 useless extension candidates. Maximal degree in co-relation 29505. Up to 4527 conditions per place. [2024-06-21 17:11:12,278 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 210 selfloop transitions, 61 changer transitions 0/276 dead transitions. [2024-06-21 17:11:12,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 276 transitions, 3609 flow [2024-06-21 17:11:12,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:11:12,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:11:12,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 17:11:12,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 17:11:12,280 INFO L175 Difference]: Start difference. First operand has 183 places, 250 transitions, 2733 flow. Second operand 7 states and 121 transitions. [2024-06-21 17:11:12,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 276 transitions, 3609 flow [2024-06-21 17:11:12,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 276 transitions, 3247 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-21 17:11:12,495 INFO L231 Difference]: Finished difference. Result has 180 places, 258 transitions, 2631 flow [2024-06-21 17:11:12,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2371, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2631, PETRI_PLACES=180, PETRI_TRANSITIONS=258} [2024-06-21 17:11:12,496 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-21 17:11:12,496 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 258 transitions, 2631 flow [2024-06-21 17:11:12,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:12,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:12,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:12,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:11:12,497 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:12,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:12,497 INFO L85 PathProgramCache]: Analyzing trace with hash 484837853, now seen corresponding path program 1 times [2024-06-21 17:11:12,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:12,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732626152] [2024-06-21 17:11:12,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:12,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:14,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:14,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732626152] [2024-06-21 17:11:14,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732626152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:14,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:14,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:11:14,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484617663] [2024-06-21 17:11:14,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:14,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:11:14,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:14,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:11:14,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:11:14,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:14,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 258 transitions, 2631 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:14,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:14,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:14,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:15,935 INFO L124 PetriNetUnfolderBase]: 3174/5319 cut-off events. [2024-06-21 17:11:15,935 INFO L125 PetriNetUnfolderBase]: For 164555/164557 co-relation queries the response was YES. [2024-06-21 17:11:15,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29281 conditions, 5319 events. 3174/5319 cut-off events. For 164555/164557 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 34415 event pairs, 770 based on Foata normal form. 2/5318 useless extension candidates. Maximal degree in co-relation 29199. Up to 4888 conditions per place. [2024-06-21 17:11:15,983 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 260 selfloop transitions, 24 changer transitions 0/289 dead transitions. [2024-06-21 17:11:15,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 289 transitions, 3435 flow [2024-06-21 17:11:15,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:11:15,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:11:15,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 17:11:15,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 17:11:15,984 INFO L175 Difference]: Start difference. First operand has 180 places, 258 transitions, 2631 flow. Second operand 7 states and 123 transitions. [2024-06-21 17:11:15,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 289 transitions, 3435 flow [2024-06-21 17:11:16,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 289 transitions, 3304 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-21 17:11:16,259 INFO L231 Difference]: Finished difference. Result has 184 places, 264 transitions, 2640 flow [2024-06-21 17:11:16,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2500, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2640, PETRI_PLACES=184, PETRI_TRANSITIONS=264} [2024-06-21 17:11:16,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-21 17:11:16,260 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 264 transitions, 2640 flow [2024-06-21 17:11:16,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:16,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:16,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:16,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:11:16,261 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:16,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:16,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1765786529, now seen corresponding path program 2 times [2024-06-21 17:11:16,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:16,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597636176] [2024-06-21 17:11:16,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:16,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:16,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:18,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:18,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597636176] [2024-06-21 17:11:18,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597636176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:18,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:18,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:11:18,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098945079] [2024-06-21 17:11:18,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:18,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:11:18,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:18,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:11:18,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:11:18,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:18,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 264 transitions, 2640 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:18,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:18,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:18,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:19,762 INFO L124 PetriNetUnfolderBase]: 3184/5333 cut-off events. [2024-06-21 17:11:19,762 INFO L125 PetriNetUnfolderBase]: For 171506/171508 co-relation queries the response was YES. [2024-06-21 17:11:19,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29653 conditions, 5333 events. 3184/5333 cut-off events. For 171506/171508 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 34454 event pairs, 770 based on Foata normal form. 2/5332 useless extension candidates. Maximal degree in co-relation 29569. Up to 4898 conditions per place. [2024-06-21 17:11:19,802 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 257 selfloop transitions, 26 changer transitions 0/288 dead transitions. [2024-06-21 17:11:19,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 288 transitions, 3398 flow [2024-06-21 17:11:19,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:11:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:11:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 17:11:19,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-21 17:11:19,804 INFO L175 Difference]: Start difference. First operand has 184 places, 264 transitions, 2640 flow. Second operand 7 states and 120 transitions. [2024-06-21 17:11:19,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 288 transitions, 3398 flow [2024-06-21 17:11:20,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 288 transitions, 3318 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 17:11:20,154 INFO L231 Difference]: Finished difference. Result has 188 places, 267 transitions, 2664 flow [2024-06-21 17:11:20,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2574, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2664, PETRI_PLACES=188, PETRI_TRANSITIONS=267} [2024-06-21 17:11:20,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-21 17:11:20,154 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 267 transitions, 2664 flow [2024-06-21 17:11:20,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:20,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:20,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:20,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:11:20,155 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:20,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:20,155 INFO L85 PathProgramCache]: Analyzing trace with hash -146553931, now seen corresponding path program 3 times [2024-06-21 17:11:20,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:20,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175072538] [2024-06-21 17:11:20,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:20,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:21,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:21,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175072538] [2024-06-21 17:11:21,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175072538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:21,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:21,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:11:21,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513540781] [2024-06-21 17:11:21,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:21,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:11:21,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:21,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:11:21,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:11:21,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:21,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 267 transitions, 2664 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:21,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:21,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:21,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:23,527 INFO L124 PetriNetUnfolderBase]: 3178/5327 cut-off events. [2024-06-21 17:11:23,527 INFO L125 PetriNetUnfolderBase]: For 175780/175785 co-relation queries the response was YES. [2024-06-21 17:11:23,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29639 conditions, 5327 events. 3178/5327 cut-off events. For 175780/175785 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 34463 event pairs, 772 based on Foata normal form. 4/5326 useless extension candidates. Maximal degree in co-relation 29553. Up to 4893 conditions per place. [2024-06-21 17:11:23,573 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 251 selfloop transitions, 26 changer transitions 0/282 dead transitions. [2024-06-21 17:11:23,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 282 transitions, 3256 flow [2024-06-21 17:11:23,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:11:23,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:11:23,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 17:11:23,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-21 17:11:23,574 INFO L175 Difference]: Start difference. First operand has 188 places, 267 transitions, 2664 flow. Second operand 7 states and 114 transitions. [2024-06-21 17:11:23,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 282 transitions, 3256 flow [2024-06-21 17:11:23,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 282 transitions, 3186 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 17:11:23,923 INFO L231 Difference]: Finished difference. Result has 191 places, 267 transitions, 2652 flow [2024-06-21 17:11:23,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2594, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2652, PETRI_PLACES=191, PETRI_TRANSITIONS=267} [2024-06-21 17:11:23,924 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-21 17:11:23,924 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 267 transitions, 2652 flow [2024-06-21 17:11:23,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:23,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:23,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:23,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:11:23,925 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:23,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:23,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1997707733, now seen corresponding path program 1 times [2024-06-21 17:11:23,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:23,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084498161] [2024-06-21 17:11:23,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:23,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:26,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:26,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084498161] [2024-06-21 17:11:26,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084498161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:26,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:26,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:11:26,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201572089] [2024-06-21 17:11:26,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:26,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:11:26,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:26,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:11:26,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:11:26,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:26,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 267 transitions, 2652 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:26,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:26,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:26,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:27,505 INFO L124 PetriNetUnfolderBase]: 3238/5391 cut-off events. [2024-06-21 17:11:27,506 INFO L125 PetriNetUnfolderBase]: For 194275/194282 co-relation queries the response was YES. [2024-06-21 17:11:27,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30314 conditions, 5391 events. 3238/5391 cut-off events. For 194275/194282 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 34688 event pairs, 684 based on Foata normal form. 16/5403 useless extension candidates. Maximal degree in co-relation 30227. Up to 4666 conditions per place. [2024-06-21 17:11:27,552 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 236 selfloop transitions, 70 changer transitions 0/311 dead transitions. [2024-06-21 17:11:27,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 311 transitions, 3706 flow [2024-06-21 17:11:27,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:27,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:27,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 17:11:27,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 17:11:27,553 INFO L175 Difference]: Start difference. First operand has 191 places, 267 transitions, 2652 flow. Second operand 9 states and 156 transitions. [2024-06-21 17:11:27,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 311 transitions, 3706 flow [2024-06-21 17:11:27,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 311 transitions, 3628 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 17:11:27,849 INFO L231 Difference]: Finished difference. Result has 193 places, 279 transitions, 2891 flow [2024-06-21 17:11:27,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2574, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2891, PETRI_PLACES=193, PETRI_TRANSITIONS=279} [2024-06-21 17:11:27,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-21 17:11:27,850 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 279 transitions, 2891 flow [2024-06-21 17:11:27,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:27,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:27,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:27,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:11:27,850 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:27,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:27,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1306701129, now seen corresponding path program 2 times [2024-06-21 17:11:27,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:27,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530438130] [2024-06-21 17:11:27,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:27,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:29,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:29,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530438130] [2024-06-21 17:11:29,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530438130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:29,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:29,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:11:29,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143262068] [2024-06-21 17:11:29,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:29,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:11:29,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:29,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:11:29,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:11:30,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:30,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 279 transitions, 2891 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:30,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:30,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:30,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:31,233 INFO L124 PetriNetUnfolderBase]: 3206/5362 cut-off events. [2024-06-21 17:11:31,233 INFO L125 PetriNetUnfolderBase]: For 187586/187601 co-relation queries the response was YES. [2024-06-21 17:11:31,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30210 conditions, 5362 events. 3206/5362 cut-off events. For 187586/187601 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 34682 event pairs, 680 based on Foata normal form. 20/5378 useless extension candidates. Maximal degree in co-relation 30122. Up to 4638 conditions per place. [2024-06-21 17:11:31,275 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 62 changer transitions 0/302 dead transitions. [2024-06-21 17:11:31,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 302 transitions, 3647 flow [2024-06-21 17:11:31,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:11:31,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:11:31,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 17:11:31,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 17:11:31,279 INFO L175 Difference]: Start difference. First operand has 193 places, 279 transitions, 2891 flow. Second operand 7 states and 124 transitions. [2024-06-21 17:11:31,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 302 transitions, 3647 flow [2024-06-21 17:11:31,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 302 transitions, 3503 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 17:11:31,605 INFO L231 Difference]: Finished difference. Result has 195 places, 279 transitions, 2887 flow [2024-06-21 17:11:31,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2747, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2887, PETRI_PLACES=195, PETRI_TRANSITIONS=279} [2024-06-21 17:11:31,606 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-21 17:11:31,606 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 279 transitions, 2887 flow [2024-06-21 17:11:31,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:31,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:31,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:31,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:11:31,606 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:31,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:31,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1940390105, now seen corresponding path program 1 times [2024-06-21 17:11:31,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:31,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797132098] [2024-06-21 17:11:31,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:31,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:34,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:34,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:34,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797132098] [2024-06-21 17:11:34,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797132098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:34,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:34,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:34,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144714973] [2024-06-21 17:11:34,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:34,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:34,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:34,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:34,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:34,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:11:34,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 279 transitions, 2887 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:34,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:34,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:11:34,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:36,062 INFO L124 PetriNetUnfolderBase]: 3065/5169 cut-off events. [2024-06-21 17:11:36,062 INFO L125 PetriNetUnfolderBase]: For 188757/188789 co-relation queries the response was YES. [2024-06-21 17:11:36,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29273 conditions, 5169 events. 3065/5169 cut-off events. For 188757/188789 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 33968 event pairs, 686 based on Foata normal form. 19/5141 useless extension candidates. Maximal degree in co-relation 29184. Up to 4622 conditions per place. [2024-06-21 17:11:36,103 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 262 selfloop transitions, 17 changer transitions 0/304 dead transitions. [2024-06-21 17:11:36,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 304 transitions, 3567 flow [2024-06-21 17:11:36,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:11:36,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:11:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 17:11:36,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 17:11:36,105 INFO L175 Difference]: Start difference. First operand has 195 places, 279 transitions, 2887 flow. Second operand 7 states and 122 transitions. [2024-06-21 17:11:36,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 304 transitions, 3567 flow [2024-06-21 17:11:36,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 304 transitions, 3443 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 17:11:36,521 INFO L231 Difference]: Finished difference. Result has 196 places, 281 transitions, 2861 flow [2024-06-21 17:11:36,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2763, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2861, PETRI_PLACES=196, PETRI_TRANSITIONS=281} [2024-06-21 17:11:36,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-21 17:11:36,522 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 281 transitions, 2861 flow [2024-06-21 17:11:36,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:36,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:36,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:36,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:11:36,522 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:36,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:36,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1107578829, now seen corresponding path program 3 times [2024-06-21 17:11:36,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:36,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663945115] [2024-06-21 17:11:36,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:36,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:38,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:38,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663945115] [2024-06-21 17:11:38,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663945115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:38,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:38,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:11:38,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441733622] [2024-06-21 17:11:38,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:38,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:11:38,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:38,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:11:38,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:11:38,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:38,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 281 transitions, 2861 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:38,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:38,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:38,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:40,002 INFO L124 PetriNetUnfolderBase]: 3194/5333 cut-off events. [2024-06-21 17:11:40,003 INFO L125 PetriNetUnfolderBase]: For 191144/191150 co-relation queries the response was YES. [2024-06-21 17:11:40,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29899 conditions, 5333 events. 3194/5333 cut-off events. For 191144/191150 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 34393 event pairs, 694 based on Foata normal form. 8/5327 useless extension candidates. Maximal degree in co-relation 29809. Up to 4798 conditions per place. [2024-06-21 17:11:40,053 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 263 selfloop transitions, 36 changer transitions 0/304 dead transitions. [2024-06-21 17:11:40,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 304 transitions, 3531 flow [2024-06-21 17:11:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:11:40,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:11:40,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 17:11:40,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 17:11:40,055 INFO L175 Difference]: Start difference. First operand has 196 places, 281 transitions, 2861 flow. Second operand 7 states and 121 transitions. [2024-06-21 17:11:40,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 304 transitions, 3531 flow [2024-06-21 17:11:40,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 304 transitions, 3431 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 17:11:40,375 INFO L231 Difference]: Finished difference. Result has 198 places, 281 transitions, 2841 flow [2024-06-21 17:11:40,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2761, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2841, PETRI_PLACES=198, PETRI_TRANSITIONS=281} [2024-06-21 17:11:40,376 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-21 17:11:40,376 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 281 transitions, 2841 flow [2024-06-21 17:11:40,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:40,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:40,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:40,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:11:40,377 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:40,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:40,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1095198669, now seen corresponding path program 4 times [2024-06-21 17:11:40,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:40,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432477001] [2024-06-21 17:11:40,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:40,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:42,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:42,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432477001] [2024-06-21 17:11:42,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432477001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:42,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:42,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:11:42,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24108865] [2024-06-21 17:11:42,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:42,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:11:42,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:42,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:11:42,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:11:42,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:42,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 281 transitions, 2841 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:42,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:42,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:42,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:44,012 INFO L124 PetriNetUnfolderBase]: 3204/5341 cut-off events. [2024-06-21 17:11:44,012 INFO L125 PetriNetUnfolderBase]: For 194344/194352 co-relation queries the response was YES. [2024-06-21 17:11:44,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30098 conditions, 5341 events. 3204/5341 cut-off events. For 194344/194352 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 34341 event pairs, 687 based on Foata normal form. 8/5335 useless extension candidates. Maximal degree in co-relation 30007. Up to 4563 conditions per place. [2024-06-21 17:11:44,052 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 216 selfloop transitions, 86 changer transitions 0/307 dead transitions. [2024-06-21 17:11:44,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 307 transitions, 3657 flow [2024-06-21 17:11:44,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:11:44,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:11:44,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 17:11:44,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 17:11:44,054 INFO L175 Difference]: Start difference. First operand has 198 places, 281 transitions, 2841 flow. Second operand 7 states and 125 transitions. [2024-06-21 17:11:44,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 307 transitions, 3657 flow [2024-06-21 17:11:44,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 307 transitions, 3516 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 17:11:44,380 INFO L231 Difference]: Finished difference. Result has 198 places, 284 transitions, 2920 flow [2024-06-21 17:11:44,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2700, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2920, PETRI_PLACES=198, PETRI_TRANSITIONS=284} [2024-06-21 17:11:44,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-21 17:11:44,380 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 284 transitions, 2920 flow [2024-06-21 17:11:44,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:44,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:44,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:44,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:11:44,381 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:44,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:44,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1657945677, now seen corresponding path program 5 times [2024-06-21 17:11:44,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:44,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971988280] [2024-06-21 17:11:44,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:44,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:44,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:46,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:46,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:46,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971988280] [2024-06-21 17:11:46,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971988280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:46,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:46,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:11:46,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838270996] [2024-06-21 17:11:46,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:46,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:11:46,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:46,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:11:46,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:11:46,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:46,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 284 transitions, 2920 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:46,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:46,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:46,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:47,883 INFO L124 PetriNetUnfolderBase]: 3214/5373 cut-off events. [2024-06-21 17:11:47,883 INFO L125 PetriNetUnfolderBase]: For 201533/201566 co-relation queries the response was YES. [2024-06-21 17:11:47,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30534 conditions, 5373 events. 3214/5373 cut-off events. For 201533/201566 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 34632 event pairs, 696 based on Foata normal form. 18/5372 useless extension candidates. Maximal degree in co-relation 30442. Up to 4569 conditions per place. [2024-06-21 17:11:47,933 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 217 selfloop transitions, 82 changer transitions 0/304 dead transitions. [2024-06-21 17:11:47,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 304 transitions, 3718 flow [2024-06-21 17:11:47,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:11:47,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:11:47,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 17:11:47,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 17:11:47,934 INFO L175 Difference]: Start difference. First operand has 198 places, 284 transitions, 2920 flow. Second operand 7 states and 119 transitions. [2024-06-21 17:11:47,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 304 transitions, 3718 flow [2024-06-21 17:11:48,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 304 transitions, 3565 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 17:11:48,213 INFO L231 Difference]: Finished difference. Result has 201 places, 287 transitions, 2985 flow [2024-06-21 17:11:48,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2770, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2985, PETRI_PLACES=201, PETRI_TRANSITIONS=287} [2024-06-21 17:11:48,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-21 17:11:48,215 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 287 transitions, 2985 flow [2024-06-21 17:11:48,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:48,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:48,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:48,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 17:11:48,215 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:48,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:48,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1010376755, now seen corresponding path program 6 times [2024-06-21 17:11:48,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:48,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908682280] [2024-06-21 17:11:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:48,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:50,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:50,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908682280] [2024-06-21 17:11:50,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908682280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:50,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:50,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:11:50,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276070051] [2024-06-21 17:11:50,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:50,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:11:50,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:50,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:11:50,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:11:50,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:11:50,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 287 transitions, 2985 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:50,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:50,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:11:50,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:51,886 INFO L124 PetriNetUnfolderBase]: 3198/5349 cut-off events. [2024-06-21 17:11:51,886 INFO L125 PetriNetUnfolderBase]: For 205425/205458 co-relation queries the response was YES. [2024-06-21 17:11:51,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30290 conditions, 5349 events. 3198/5349 cut-off events. For 205425/205458 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 34498 event pairs, 697 based on Foata normal form. 20/5350 useless extension candidates. Maximal degree in co-relation 30197. Up to 4556 conditions per place. [2024-06-21 17:11:51,933 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 224 selfloop transitions, 74 changer transitions 0/303 dead transitions. [2024-06-21 17:11:51,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 303 transitions, 3625 flow [2024-06-21 17:11:51,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:11:51,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:11:51,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 17:11:51,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 17:11:51,934 INFO L175 Difference]: Start difference. First operand has 201 places, 287 transitions, 2985 flow. Second operand 7 states and 119 transitions. [2024-06-21 17:11:51,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 303 transitions, 3625 flow [2024-06-21 17:11:52,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 303 transitions, 3390 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 17:11:52,255 INFO L231 Difference]: Finished difference. Result has 203 places, 287 transitions, 2906 flow [2024-06-21 17:11:52,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2906, PETRI_PLACES=203, PETRI_TRANSITIONS=287} [2024-06-21 17:11:52,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-21 17:11:52,255 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 287 transitions, 2906 flow [2024-06-21 17:11:52,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:52,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:52,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:52,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 17:11:52,256 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:52,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:52,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1024195253, now seen corresponding path program 2 times [2024-06-21 17:11:52,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:52,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999470150] [2024-06-21 17:11:52,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:52,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:55,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:55,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999470150] [2024-06-21 17:11:55,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999470150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:55,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:55,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:55,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220689612] [2024-06-21 17:11:55,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:55,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:55,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:55,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:55,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:55,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:11:55,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 287 transitions, 2906 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:55,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:55,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:11:55,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:56,702 INFO L124 PetriNetUnfolderBase]: 3060/5175 cut-off events. [2024-06-21 17:11:56,702 INFO L125 PetriNetUnfolderBase]: For 210644/210680 co-relation queries the response was YES. [2024-06-21 17:11:56,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29429 conditions, 5175 events. 3060/5175 cut-off events. For 210644/210680 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 34037 event pairs, 660 based on Foata normal form. 23/5158 useless extension candidates. Maximal degree in co-relation 29335. Up to 4606 conditions per place. [2024-06-21 17:11:56,743 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 257 selfloop transitions, 22 changer transitions 0/306 dead transitions. [2024-06-21 17:11:56,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 306 transitions, 3572 flow [2024-06-21 17:11:56,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:11:56,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:11:56,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 17:11:56,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-21 17:11:56,745 INFO L175 Difference]: Start difference. First operand has 203 places, 287 transitions, 2906 flow. Second operand 7 states and 117 transitions. [2024-06-21 17:11:56,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 306 transitions, 3572 flow [2024-06-21 17:11:57,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 306 transitions, 3390 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:11:57,033 INFO L231 Difference]: Finished difference. Result has 203 places, 289 transitions, 2835 flow [2024-06-21 17:11:57,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2724, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2835, PETRI_PLACES=203, PETRI_TRANSITIONS=289} [2024-06-21 17:11:57,033 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-21 17:11:57,034 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 289 transitions, 2835 flow [2024-06-21 17:11:57,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:57,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:57,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:57,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 17:11:57,034 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:11:57,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:57,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1024670483, now seen corresponding path program 3 times [2024-06-21 17:11:57,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:57,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282706852] [2024-06-21 17:11:57,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:57,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:59,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:59,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282706852] [2024-06-21 17:11:59,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282706852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:59,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:59,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:59,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959876943] [2024-06-21 17:11:59,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:59,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:59,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:59,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:59,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:59,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:11:59,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 289 transitions, 2835 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:11:59,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:59,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:11:59,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:01,308 INFO L124 PetriNetUnfolderBase]: 3055/5168 cut-off events. [2024-06-21 17:12:01,308 INFO L125 PetriNetUnfolderBase]: For 214987/215023 co-relation queries the response was YES. [2024-06-21 17:12:01,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29197 conditions, 5168 events. 3055/5168 cut-off events. For 214987/215023 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 33945 event pairs, 659 based on Foata normal form. 23/5151 useless extension candidates. Maximal degree in co-relation 29102. Up to 4577 conditions per place. [2024-06-21 17:12:01,363 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 254 selfloop transitions, 27 changer transitions 0/308 dead transitions. [2024-06-21 17:12:01,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 308 transitions, 3509 flow [2024-06-21 17:12:01,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:12:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:12:01,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 17:12:01,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-21 17:12:01,364 INFO L175 Difference]: Start difference. First operand has 203 places, 289 transitions, 2835 flow. Second operand 7 states and 117 transitions. [2024-06-21 17:12:01,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 308 transitions, 3509 flow [2024-06-21 17:12:01,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 308 transitions, 3414 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 17:12:01,772 INFO L231 Difference]: Finished difference. Result has 205 places, 291 transitions, 2865 flow [2024-06-21 17:12:01,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2740, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2865, PETRI_PLACES=205, PETRI_TRANSITIONS=291} [2024-06-21 17:12:01,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-21 17:12:01,773 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 291 transitions, 2865 flow [2024-06-21 17:12:01,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:01,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:01,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:01,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 17:12:01,773 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:01,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:01,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1099952333, now seen corresponding path program 1 times [2024-06-21 17:12:01,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:01,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609648841] [2024-06-21 17:12:01,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:01,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:04,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:04,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609648841] [2024-06-21 17:12:04,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609648841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:04,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:04,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:12:04,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579946688] [2024-06-21 17:12:04,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:04,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:12:04,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:04,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:12:04,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:12:04,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:04,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 291 transitions, 2865 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:04,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:04,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:04,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:06,074 INFO L124 PetriNetUnfolderBase]: 3211/5376 cut-off events. [2024-06-21 17:12:06,074 INFO L125 PetriNetUnfolderBase]: For 220294/220296 co-relation queries the response was YES. [2024-06-21 17:12:06,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30363 conditions, 5376 events. 3211/5376 cut-off events. For 220294/220296 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 34811 event pairs, 790 based on Foata normal form. 2/5375 useless extension candidates. Maximal degree in co-relation 30267. Up to 4967 conditions per place. [2024-06-21 17:12:06,123 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 298 selfloop transitions, 17 changer transitions 0/320 dead transitions. [2024-06-21 17:12:06,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 320 transitions, 3603 flow [2024-06-21 17:12:06,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:12:06,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:12:06,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:12:06,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 17:12:06,125 INFO L175 Difference]: Start difference. First operand has 205 places, 291 transitions, 2865 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:12:06,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 320 transitions, 3603 flow [2024-06-21 17:12:06,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 320 transitions, 3494 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 17:12:06,448 INFO L231 Difference]: Finished difference. Result has 208 places, 294 transitions, 2838 flow [2024-06-21 17:12:06,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2756, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2838, PETRI_PLACES=208, PETRI_TRANSITIONS=294} [2024-06-21 17:12:06,448 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-21 17:12:06,448 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 294 transitions, 2838 flow [2024-06-21 17:12:06,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:06,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:06,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:06,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 17:12:06,449 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:06,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:06,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1099832363, now seen corresponding path program 2 times [2024-06-21 17:12:06,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:06,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145479334] [2024-06-21 17:12:06,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:06,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:08,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:08,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:08,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145479334] [2024-06-21 17:12:08,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145479334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:08,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:08,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:12:08,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125536708] [2024-06-21 17:12:08,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:08,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:12:08,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:08,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:12:08,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:12:08,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:08,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 294 transitions, 2838 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:08,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:08,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:08,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:10,646 INFO L124 PetriNetUnfolderBase]: 3221/5390 cut-off events. [2024-06-21 17:12:10,646 INFO L125 PetriNetUnfolderBase]: For 226460/226462 co-relation queries the response was YES. [2024-06-21 17:12:10,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30759 conditions, 5390 events. 3221/5390 cut-off events. For 226460/226462 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 34860 event pairs, 769 based on Foata normal form. 2/5389 useless extension candidates. Maximal degree in co-relation 30662. Up to 4916 conditions per place. [2024-06-21 17:12:10,696 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 286 selfloop transitions, 36 changer transitions 0/327 dead transitions. [2024-06-21 17:12:10,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 327 transitions, 3752 flow [2024-06-21 17:12:10,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:12:10,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:12:10,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:12:10,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 17:12:10,697 INFO L175 Difference]: Start difference. First operand has 208 places, 294 transitions, 2838 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:12:10,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 327 transitions, 3752 flow [2024-06-21 17:12:11,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 327 transitions, 3692 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 17:12:11,047 INFO L231 Difference]: Finished difference. Result has 210 places, 300 transitions, 2946 flow [2024-06-21 17:12:11,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2778, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2946, PETRI_PLACES=210, PETRI_TRANSITIONS=300} [2024-06-21 17:12:11,048 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-21 17:12:11,048 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 300 transitions, 2946 flow [2024-06-21 17:12:11,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:11,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:11,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:11,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 17:12:11,048 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:11,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:11,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1095190733, now seen corresponding path program 3 times [2024-06-21 17:12:11,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:11,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062324383] [2024-06-21 17:12:11,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:11,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:13,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:13,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062324383] [2024-06-21 17:12:13,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062324383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:13,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:13,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:12:13,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038143491] [2024-06-21 17:12:13,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:13,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:12:13,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:13,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:12:13,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:12:13,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:13,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 300 transitions, 2946 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:13,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:13,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:13,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:15,261 INFO L124 PetriNetUnfolderBase]: 3231/5408 cut-off events. [2024-06-21 17:12:15,261 INFO L125 PetriNetUnfolderBase]: For 235197/235199 co-relation queries the response was YES. [2024-06-21 17:12:15,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31327 conditions, 5408 events. 3231/5408 cut-off events. For 235197/235199 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 35043 event pairs, 771 based on Foata normal form. 2/5407 useless extension candidates. Maximal degree in co-relation 31229. Up to 4926 conditions per place. [2024-06-21 17:12:15,306 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 283 selfloop transitions, 38 changer transitions 0/326 dead transitions. [2024-06-21 17:12:15,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 326 transitions, 3812 flow [2024-06-21 17:12:15,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:12:15,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:12:15,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:12:15,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 17:12:15,307 INFO L175 Difference]: Start difference. First operand has 210 places, 300 transitions, 2946 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:12:15,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 326 transitions, 3812 flow [2024-06-21 17:12:15,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 326 transitions, 3738 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 17:12:15,672 INFO L231 Difference]: Finished difference. Result has 214 places, 303 transitions, 3002 flow [2024-06-21 17:12:15,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2878, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3002, PETRI_PLACES=214, PETRI_TRANSITIONS=303} [2024-06-21 17:12:15,672 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-21 17:12:15,672 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 303 transitions, 3002 flow [2024-06-21 17:12:15,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:15,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:15,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:15,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 17:12:15,673 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:15,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:15,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1095183789, now seen corresponding path program 1 times [2024-06-21 17:12:15,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:15,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594549471] [2024-06-21 17:12:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:15,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:18,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:18,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594549471] [2024-06-21 17:12:18,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594549471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:18,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:18,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:12:18,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705041809] [2024-06-21 17:12:18,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:18,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:12:18,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:18,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:12:18,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:12:18,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:18,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 303 transitions, 3002 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:18,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:18,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:18,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:19,841 INFO L124 PetriNetUnfolderBase]: 3239/5420 cut-off events. [2024-06-21 17:12:19,841 INFO L125 PetriNetUnfolderBase]: For 242327/242329 co-relation queries the response was YES. [2024-06-21 17:12:19,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31592 conditions, 5420 events. 3239/5420 cut-off events. For 242327/242329 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 35124 event pairs, 775 based on Foata normal form. 2/5419 useless extension candidates. Maximal degree in co-relation 31492. Up to 5009 conditions per place. [2024-06-21 17:12:19,893 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 302 selfloop transitions, 18 changer transitions 0/325 dead transitions. [2024-06-21 17:12:19,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 325 transitions, 3730 flow [2024-06-21 17:12:19,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:12:19,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:12:19,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 17:12:19,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 17:12:19,894 INFO L175 Difference]: Start difference. First operand has 214 places, 303 transitions, 3002 flow. Second operand 7 states and 116 transitions. [2024-06-21 17:12:19,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 325 transitions, 3730 flow [2024-06-21 17:12:20,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 325 transitions, 3644 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 17:12:20,419 INFO L231 Difference]: Finished difference. Result has 216 places, 305 transitions, 2997 flow [2024-06-21 17:12:20,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2916, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2997, PETRI_PLACES=216, PETRI_TRANSITIONS=305} [2024-06-21 17:12:20,419 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-21 17:12:20,419 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 305 transitions, 2997 flow [2024-06-21 17:12:20,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:20,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:20,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:20,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 17:12:20,420 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:20,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:20,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1731024919, now seen corresponding path program 2 times [2024-06-21 17:12:20,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:20,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179099806] [2024-06-21 17:12:20,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:20,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:20,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:23,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:23,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179099806] [2024-06-21 17:12:23,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179099806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:23,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:23,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:12:23,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637794330] [2024-06-21 17:12:23,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:23,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:12:23,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:23,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:12:23,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:12:23,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:23,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 305 transitions, 2997 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:23,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:23,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:23,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:24,630 INFO L124 PetriNetUnfolderBase]: 3247/5433 cut-off events. [2024-06-21 17:12:24,630 INFO L125 PetriNetUnfolderBase]: For 250155/250160 co-relation queries the response was YES. [2024-06-21 17:12:24,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31793 conditions, 5433 events. 3247/5433 cut-off events. For 250155/250160 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35201 event pairs, 776 based on Foata normal form. 4/5433 useless extension candidates. Maximal degree in co-relation 31692. Up to 5021 conditions per place. [2024-06-21 17:12:24,682 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 299 selfloop transitions, 18 changer transitions 0/322 dead transitions. [2024-06-21 17:12:24,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 322 transitions, 3709 flow [2024-06-21 17:12:24,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:12:24,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:12:24,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 17:12:24,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-21 17:12:24,683 INFO L175 Difference]: Start difference. First operand has 216 places, 305 transitions, 2997 flow. Second operand 7 states and 111 transitions. [2024-06-21 17:12:24,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 322 transitions, 3709 flow [2024-06-21 17:12:25,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 322 transitions, 3644 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 17:12:25,263 INFO L231 Difference]: Finished difference. Result has 218 places, 307 transitions, 3017 flow [2024-06-21 17:12:25,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2932, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3017, PETRI_PLACES=218, PETRI_TRANSITIONS=307} [2024-06-21 17:12:25,264 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-21 17:12:25,264 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 307 transitions, 3017 flow [2024-06-21 17:12:25,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:25,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:25,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:25,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 17:12:25,264 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:25,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:25,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1379376511, now seen corresponding path program 4 times [2024-06-21 17:12:25,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:25,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469983104] [2024-06-21 17:12:25,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:25,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:27,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:27,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:27,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469983104] [2024-06-21 17:12:27,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469983104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:27,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:27,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:12:27,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075460792] [2024-06-21 17:12:27,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:27,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:12:27,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:27,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:12:27,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:12:27,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:27,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 307 transitions, 3017 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:27,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:27,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:27,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:29,472 INFO L124 PetriNetUnfolderBase]: 3241/5425 cut-off events. [2024-06-21 17:12:29,472 INFO L125 PetriNetUnfolderBase]: For 253978/253983 co-relation queries the response was YES. [2024-06-21 17:12:29,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31768 conditions, 5425 events. 3241/5425 cut-off events. For 253978/253983 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35132 event pairs, 784 based on Foata normal form. 2/5421 useless extension candidates. Maximal degree in co-relation 31666. Up to 4945 conditions per place. [2024-06-21 17:12:29,526 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 281 selfloop transitions, 38 changer transitions 0/324 dead transitions. [2024-06-21 17:12:29,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 324 transitions, 3697 flow [2024-06-21 17:12:29,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:12:29,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:12:29,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 17:12:29,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-21 17:12:29,528 INFO L175 Difference]: Start difference. First operand has 218 places, 307 transitions, 3017 flow. Second operand 8 states and 129 transitions. [2024-06-21 17:12:29,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 324 transitions, 3697 flow [2024-06-21 17:12:30,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 324 transitions, 3610 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 17:12:30,080 INFO L231 Difference]: Finished difference. Result has 221 places, 307 transitions, 3012 flow [2024-06-21 17:12:30,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2930, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3012, PETRI_PLACES=221, PETRI_TRANSITIONS=307} [2024-06-21 17:12:30,080 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-21 17:12:30,080 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 307 transitions, 3012 flow [2024-06-21 17:12:30,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:30,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:30,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:30,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 17:12:30,081 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:30,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:30,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1024676435, now seen corresponding path program 3 times [2024-06-21 17:12:30,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:30,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181555518] [2024-06-21 17:12:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:30,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:32,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:32,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:32,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181555518] [2024-06-21 17:12:32,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181555518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:32,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:32,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:12:32,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74096732] [2024-06-21 17:12:32,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:32,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:12:32,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:32,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:12:32,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:12:32,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:32,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 307 transitions, 3012 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:32,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:32,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:32,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:34,139 INFO L124 PetriNetUnfolderBase]: 3236/5418 cut-off events. [2024-06-21 17:12:34,139 INFO L125 PetriNetUnfolderBase]: For 256995/257000 co-relation queries the response was YES. [2024-06-21 17:12:34,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31681 conditions, 5418 events. 3236/5418 cut-off events. For 256995/257000 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35096 event pairs, 773 based on Foata normal form. 4/5418 useless extension candidates. Maximal degree in co-relation 31578. Up to 4986 conditions per place. [2024-06-21 17:12:34,196 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 296 selfloop transitions, 23 changer transitions 0/324 dead transitions. [2024-06-21 17:12:34,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 324 transitions, 3732 flow [2024-06-21 17:12:34,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:12:34,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:12:34,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 17:12:34,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-21 17:12:34,198 INFO L175 Difference]: Start difference. First operand has 221 places, 307 transitions, 3012 flow. Second operand 7 states and 111 transitions. [2024-06-21 17:12:34,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 324 transitions, 3732 flow [2024-06-21 17:12:34,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 324 transitions, 3614 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 17:12:34,664 INFO L231 Difference]: Finished difference. Result has 220 places, 309 transitions, 2993 flow [2024-06-21 17:12:34,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2894, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2993, PETRI_PLACES=220, PETRI_TRANSITIONS=309} [2024-06-21 17:12:34,666 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-21 17:12:34,666 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 309 transitions, 2993 flow [2024-06-21 17:12:34,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:34,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:34,666 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] [2024-06-21 17:12:34,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 17:12:34,666 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:34,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:34,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1469549822, now seen corresponding path program 1 times [2024-06-21 17:12:34,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:34,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107952685] [2024-06-21 17:12:34,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:34,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:37,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:37,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107952685] [2024-06-21 17:12:37,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107952685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:37,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:37,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:12:37,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968377615] [2024-06-21 17:12:37,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:37,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:12:37,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:37,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:12:37,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:12:37,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:37,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 309 transitions, 2993 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:37,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:37,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:37,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:38,883 INFO L124 PetriNetUnfolderBase]: 3410/5671 cut-off events. [2024-06-21 17:12:38,883 INFO L125 PetriNetUnfolderBase]: For 339301/339322 co-relation queries the response was YES. [2024-06-21 17:12:38,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34889 conditions, 5671 events. 3410/5671 cut-off events. For 339301/339322 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 36664 event pairs, 580 based on Foata normal form. 36/5703 useless extension candidates. Maximal degree in co-relation 34785. Up to 4658 conditions per place. [2024-06-21 17:12:38,933 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 279 selfloop transitions, 77 changer transitions 0/361 dead transitions. [2024-06-21 17:12:38,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 361 transitions, 4107 flow [2024-06-21 17:12:38,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:38,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:38,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 17:12:38,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 17:12:38,934 INFO L175 Difference]: Start difference. First operand has 220 places, 309 transitions, 2993 flow. Second operand 10 states and 181 transitions. [2024-06-21 17:12:38,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 361 transitions, 4107 flow [2024-06-21 17:12:39,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 361 transitions, 4024 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 17:12:39,356 INFO L231 Difference]: Finished difference. Result has 225 places, 313 transitions, 3177 flow [2024-06-21 17:12:39,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3177, PETRI_PLACES=225, PETRI_TRANSITIONS=313} [2024-06-21 17:12:39,357 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-21 17:12:39,357 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 313 transitions, 3177 flow [2024-06-21 17:12:39,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:39,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:39,358 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] [2024-06-21 17:12:39,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 17:12:39,358 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:39,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:39,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1491141092, now seen corresponding path program 2 times [2024-06-21 17:12:39,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:39,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488170378] [2024-06-21 17:12:39,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:39,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:41,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:41,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488170378] [2024-06-21 17:12:41,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488170378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:41,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:41,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:12:41,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574211905] [2024-06-21 17:12:41,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:41,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:12:41,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:41,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:12:41,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:12:41,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:41,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 313 transitions, 3177 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:41,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:41,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:41,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:43,520 INFO L124 PetriNetUnfolderBase]: 3482/5807 cut-off events. [2024-06-21 17:12:43,520 INFO L125 PetriNetUnfolderBase]: For 361443/361464 co-relation queries the response was YES. [2024-06-21 17:12:43,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36364 conditions, 5807 events. 3482/5807 cut-off events. For 361443/361464 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 37926 event pairs, 726 based on Foata normal form. 40/5843 useless extension candidates. Maximal degree in co-relation 36259. Up to 4978 conditions per place. [2024-06-21 17:12:43,580 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 278 selfloop transitions, 72 changer transitions 0/355 dead transitions. [2024-06-21 17:12:43,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 355 transitions, 4067 flow [2024-06-21 17:12:43,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:43,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:43,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 17:12:43,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 17:12:43,581 INFO L175 Difference]: Start difference. First operand has 225 places, 313 transitions, 3177 flow. Second operand 10 states and 174 transitions. [2024-06-21 17:12:43,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 355 transitions, 4067 flow [2024-06-21 17:12:44,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 355 transitions, 3913 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 17:12:44,030 INFO L231 Difference]: Finished difference. Result has 229 places, 315 transitions, 3235 flow [2024-06-21 17:12:44,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3031, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3235, PETRI_PLACES=229, PETRI_TRANSITIONS=315} [2024-06-21 17:12:44,030 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-21 17:12:44,030 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 315 transitions, 3235 flow [2024-06-21 17:12:44,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:44,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:44,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:44,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 17:12:44,034 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:44,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:44,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1806627782, now seen corresponding path program 3 times [2024-06-21 17:12:44,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:44,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268442756] [2024-06-21 17:12:44,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:44,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:46,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:46,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268442756] [2024-06-21 17:12:46,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268442756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:46,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:46,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:12:46,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505244515] [2024-06-21 17:12:46,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:46,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:12:46,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:46,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:12:46,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:12:46,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:46,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 315 transitions, 3235 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:46,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:46,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:46,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:47,908 INFO L124 PetriNetUnfolderBase]: 3436/5734 cut-off events. [2024-06-21 17:12:47,908 INFO L125 PetriNetUnfolderBase]: For 324640/324655 co-relation queries the response was YES. [2024-06-21 17:12:47,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34647 conditions, 5734 events. 3436/5734 cut-off events. For 324640/324655 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 37440 event pairs, 721 based on Foata normal form. 32/5762 useless extension candidates. Maximal degree in co-relation 34540. Up to 4912 conditions per place. [2024-06-21 17:12:47,968 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 274 selfloop transitions, 64 changer transitions 0/343 dead transitions. [2024-06-21 17:12:47,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 343 transitions, 4007 flow [2024-06-21 17:12:47,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:12:47,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:12:47,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:12:47,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 17:12:47,970 INFO L175 Difference]: Start difference. First operand has 229 places, 315 transitions, 3235 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:12:47,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 343 transitions, 4007 flow [2024-06-21 17:12:48,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 343 transitions, 3815 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 17:12:48,738 INFO L231 Difference]: Finished difference. Result has 229 places, 315 transitions, 3179 flow [2024-06-21 17:12:48,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3043, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3179, PETRI_PLACES=229, PETRI_TRANSITIONS=315} [2024-06-21 17:12:48,739 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-21 17:12:48,739 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 315 transitions, 3179 flow [2024-06-21 17:12:48,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:48,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:48,739 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] [2024-06-21 17:12:48,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 17:12:48,739 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:48,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:48,740 INFO L85 PathProgramCache]: Analyzing trace with hash 630523458, now seen corresponding path program 1 times [2024-06-21 17:12:48,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:48,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669385836] [2024-06-21 17:12:48,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:48,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:51,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:51,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669385836] [2024-06-21 17:12:51,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669385836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:51,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:51,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:12:51,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370675978] [2024-06-21 17:12:51,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:51,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:12:51,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:51,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:12:51,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:12:51,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:51,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 315 transitions, 3179 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:51,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:51,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:51,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:53,063 INFO L124 PetriNetUnfolderBase]: 3600/5942 cut-off events. [2024-06-21 17:12:53,063 INFO L125 PetriNetUnfolderBase]: For 341270/341279 co-relation queries the response was YES. [2024-06-21 17:12:53,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36034 conditions, 5942 events. 3600/5942 cut-off events. For 341270/341279 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 38539 event pairs, 723 based on Foata normal form. 20/5956 useless extension candidates. Maximal degree in co-relation 35926. Up to 4450 conditions per place. [2024-06-21 17:12:53,126 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 192 selfloop transitions, 179 changer transitions 0/376 dead transitions. [2024-06-21 17:12:53,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 376 transitions, 4540 flow [2024-06-21 17:12:53,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:12:53,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:12:53,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-21 17:12:53,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-06-21 17:12:53,127 INFO L175 Difference]: Start difference. First operand has 229 places, 315 transitions, 3179 flow. Second operand 11 states and 195 transitions. [2024-06-21 17:12:53,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 376 transitions, 4540 flow [2024-06-21 17:12:53,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 376 transitions, 4391 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 17:12:53,660 INFO L231 Difference]: Finished difference. Result has 234 places, 335 transitions, 3620 flow [2024-06-21 17:12:53,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3620, PETRI_PLACES=234, PETRI_TRANSITIONS=335} [2024-06-21 17:12:53,661 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-21 17:12:53,661 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 335 transitions, 3620 flow [2024-06-21 17:12:53,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:53,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:53,661 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] [2024-06-21 17:12:53,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 17:12:53,661 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:53,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:53,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1600097474, now seen corresponding path program 2 times [2024-06-21 17:12:53,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:53,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832608769] [2024-06-21 17:12:53,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:53,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:56,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:56,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832608769] [2024-06-21 17:12:56,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832608769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:56,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:56,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:12:56,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691347709] [2024-06-21 17:12:56,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:56,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:12:56,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:56,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:12:56,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:12:56,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:12:56,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 335 transitions, 3620 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:56,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:56,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:12:56,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:57,799 INFO L124 PetriNetUnfolderBase]: 3628/5983 cut-off events. [2024-06-21 17:12:57,799 INFO L125 PetriNetUnfolderBase]: For 325798/325803 co-relation queries the response was YES. [2024-06-21 17:12:57,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36949 conditions, 5983 events. 3628/5983 cut-off events. For 325798/325803 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 38705 event pairs, 743 based on Foata normal form. 8/5985 useless extension candidates. Maximal degree in co-relation 36839. Up to 4474 conditions per place. [2024-06-21 17:12:57,861 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 190 selfloop transitions, 183 changer transitions 0/378 dead transitions. [2024-06-21 17:12:57,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 378 transitions, 4884 flow [2024-06-21 17:12:57,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:57,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:57,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 17:12:57,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 17:12:57,862 INFO L175 Difference]: Start difference. First operand has 234 places, 335 transitions, 3620 flow. Second operand 10 states and 181 transitions. [2024-06-21 17:12:57,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 378 transitions, 4884 flow [2024-06-21 17:12:58,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 378 transitions, 4545 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 17:12:58,425 INFO L231 Difference]: Finished difference. Result has 237 places, 343 transitions, 3764 flow [2024-06-21 17:12:58,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3299, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3764, PETRI_PLACES=237, PETRI_TRANSITIONS=343} [2024-06-21 17:12:58,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-21 17:12:58,426 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 343 transitions, 3764 flow [2024-06-21 17:12:58,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:12:58,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:58,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:58,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 17:12:58,426 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:12:58,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:58,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1195799974, now seen corresponding path program 3 times [2024-06-21 17:12:58,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:58,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090436372] [2024-06-21 17:12:58,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:58,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:00,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:00,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090436372] [2024-06-21 17:13:00,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090436372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:00,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:00,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:13:00,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130632372] [2024-06-21 17:13:00,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:00,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:13:00,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:00,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:13:00,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:13:00,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:00,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 343 transitions, 3764 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:00,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:00,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:00,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:02,290 INFO L124 PetriNetUnfolderBase]: 3616/5982 cut-off events. [2024-06-21 17:13:02,291 INFO L125 PetriNetUnfolderBase]: For 314339/314344 co-relation queries the response was YES. [2024-06-21 17:13:02,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36519 conditions, 5982 events. 3616/5982 cut-off events. For 314339/314344 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 38825 event pairs, 791 based on Foata normal form. 4/5980 useless extension candidates. Maximal degree in co-relation 36408. Up to 4466 conditions per place. [2024-06-21 17:13:02,346 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 197 selfloop transitions, 167 changer transitions 0/369 dead transitions. [2024-06-21 17:13:02,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 369 transitions, 4748 flow [2024-06-21 17:13:02,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:13:02,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:13:02,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:13:02,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:13:02,347 INFO L175 Difference]: Start difference. First operand has 237 places, 343 transitions, 3764 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:13:02,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 369 transitions, 4748 flow [2024-06-21 17:13:02,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 369 transitions, 4361 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 17:13:02,888 INFO L231 Difference]: Finished difference. Result has 238 places, 343 transitions, 3723 flow [2024-06-21 17:13:02,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3377, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3723, PETRI_PLACES=238, PETRI_TRANSITIONS=343} [2024-06-21 17:13:02,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-21 17:13:02,889 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 343 transitions, 3723 flow [2024-06-21 17:13:02,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:02,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:02,889 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] [2024-06-21 17:13:02,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 17:13:02,889 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:02,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:02,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1921564406, now seen corresponding path program 1 times [2024-06-21 17:13:02,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:02,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063008880] [2024-06-21 17:13:02,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:02,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:06,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:06,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063008880] [2024-06-21 17:13:06,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063008880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:06,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:06,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:13:06,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021863576] [2024-06-21 17:13:06,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:06,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:13:06,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:06,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:13:06,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:13:06,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:06,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 343 transitions, 3723 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:06,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:06,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:06,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:07,972 INFO L124 PetriNetUnfolderBase]: 3735/6185 cut-off events. [2024-06-21 17:13:07,972 INFO L125 PetriNetUnfolderBase]: For 373726/373741 co-relation queries the response was YES. [2024-06-21 17:13:08,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38650 conditions, 6185 events. 3735/6185 cut-off events. For 373726/373741 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 40649 event pairs, 733 based on Foata normal form. 24/6205 useless extension candidates. Maximal degree in co-relation 38538. Up to 5022 conditions per place. [2024-06-21 17:13:08,028 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 312 selfloop transitions, 61 changer transitions 0/378 dead transitions. [2024-06-21 17:13:08,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 378 transitions, 4837 flow [2024-06-21 17:13:08,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:13:08,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:13:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:13:08,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 17:13:08,030 INFO L175 Difference]: Start difference. First operand has 238 places, 343 transitions, 3723 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:13:08,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 378 transitions, 4837 flow [2024-06-21 17:13:08,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 378 transitions, 4470 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 17:13:08,551 INFO L231 Difference]: Finished difference. Result has 239 places, 347 transitions, 3638 flow [2024-06-21 17:13:08,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3356, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3638, PETRI_PLACES=239, PETRI_TRANSITIONS=347} [2024-06-21 17:13:08,551 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-21 17:13:08,552 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 347 transitions, 3638 flow [2024-06-21 17:13:08,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:08,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:08,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:08,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 17:13:08,552 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:08,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:08,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1256786886, now seen corresponding path program 4 times [2024-06-21 17:13:08,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:08,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198604007] [2024-06-21 17:13:08,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:08,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:08,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:10,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:10,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198604007] [2024-06-21 17:13:10,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198604007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:10,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:10,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:13:10,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765884475] [2024-06-21 17:13:10,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:10,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:13:10,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:10,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:13:10,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:13:10,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:10,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 347 transitions, 3638 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:10,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:10,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:10,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:12,842 INFO L124 PetriNetUnfolderBase]: 3781/6256 cut-off events. [2024-06-21 17:13:12,842 INFO L125 PetriNetUnfolderBase]: For 397094/397127 co-relation queries the response was YES. [2024-06-21 17:13:12,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38823 conditions, 6256 events. 3781/6256 cut-off events. For 397094/397127 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 40990 event pairs, 758 based on Foata normal form. 36/6273 useless extension candidates. Maximal degree in co-relation 38709. Up to 5351 conditions per place. [2024-06-21 17:13:12,909 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 288 selfloop transitions, 78 changer transitions 0/371 dead transitions. [2024-06-21 17:13:12,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 371 transitions, 4508 flow [2024-06-21 17:13:12,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:13:12,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:13:12,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:13:12,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 17:13:12,913 INFO L175 Difference]: Start difference. First operand has 239 places, 347 transitions, 3638 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:13:12,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 371 transitions, 4508 flow [2024-06-21 17:13:13,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 371 transitions, 4378 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 17:13:13,593 INFO L231 Difference]: Finished difference. Result has 243 places, 349 transitions, 3734 flow [2024-06-21 17:13:13,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3508, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3734, PETRI_PLACES=243, PETRI_TRANSITIONS=349} [2024-06-21 17:13:13,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-21 17:13:13,594 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 349 transitions, 3734 flow [2024-06-21 17:13:13,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:13,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:13,595 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] [2024-06-21 17:13:13,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 17:13:13,595 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:13,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:13,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1617757250, now seen corresponding path program 4 times [2024-06-21 17:13:13,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:13,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066979840] [2024-06-21 17:13:13,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:13,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:15,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:15,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066979840] [2024-06-21 17:13:15,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066979840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:15,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:15,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:13:15,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261158031] [2024-06-21 17:13:15,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:15,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:13:15,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:15,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:13:15,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:13:15,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:15,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 349 transitions, 3734 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:15,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:15,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:15,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:17,930 INFO L124 PetriNetUnfolderBase]: 3853/6314 cut-off events. [2024-06-21 17:13:17,930 INFO L125 PetriNetUnfolderBase]: For 388845/388849 co-relation queries the response was YES. [2024-06-21 17:13:17,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40073 conditions, 6314 events. 3853/6314 cut-off events. For 388845/388849 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 41129 event pairs, 841 based on Foata normal form. 10/6296 useless extension candidates. Maximal degree in co-relation 39957. Up to 5259 conditions per place. [2024-06-21 17:13:17,989 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 259 selfloop transitions, 138 changer transitions 0/402 dead transitions. [2024-06-21 17:13:17,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 402 transitions, 5180 flow [2024-06-21 17:13:17,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:13:17,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:13:17,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 17:13:17,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:13:17,990 INFO L175 Difference]: Start difference. First operand has 243 places, 349 transitions, 3734 flow. Second operand 10 states and 175 transitions. [2024-06-21 17:13:17,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 402 transitions, 5180 flow [2024-06-21 17:13:18,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 402 transitions, 4982 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 17:13:18,726 INFO L231 Difference]: Finished difference. Result has 247 places, 368 transitions, 4093 flow [2024-06-21 17:13:18,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3536, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4093, PETRI_PLACES=247, PETRI_TRANSITIONS=368} [2024-06-21 17:13:18,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-21 17:13:18,727 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 368 transitions, 4093 flow [2024-06-21 17:13:18,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:18,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:18,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:18,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 17:13:18,727 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:18,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:18,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1247247466, now seen corresponding path program 5 times [2024-06-21 17:13:18,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:18,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796812809] [2024-06-21 17:13:18,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:18,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:21,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:21,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:21,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796812809] [2024-06-21 17:13:21,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796812809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:21,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:21,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:13:21,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049158493] [2024-06-21 17:13:21,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:21,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:13:21,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:21,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:13:21,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:13:21,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:21,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 368 transitions, 4093 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:21,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:21,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:21,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:22,788 INFO L124 PetriNetUnfolderBase]: 3841/6308 cut-off events. [2024-06-21 17:13:22,788 INFO L125 PetriNetUnfolderBase]: For 375485/375487 co-relation queries the response was YES. [2024-06-21 17:13:22,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39762 conditions, 6308 events. 3841/6308 cut-off events. For 375485/375487 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 41110 event pairs, 857 based on Foata normal form. 4/6288 useless extension candidates. Maximal degree in co-relation 39645. Up to 5249 conditions per place. [2024-06-21 17:13:22,857 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 252 selfloop transitions, 137 changer transitions 0/394 dead transitions. [2024-06-21 17:13:22,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 394 transitions, 5105 flow [2024-06-21 17:13:22,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:13:22,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:13:22,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:13:22,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 17:13:22,858 INFO L175 Difference]: Start difference. First operand has 247 places, 368 transitions, 4093 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:13:22,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 394 transitions, 5105 flow [2024-06-21 17:13:23,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 394 transitions, 4763 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-21 17:13:23,690 INFO L231 Difference]: Finished difference. Result has 249 places, 368 transitions, 4033 flow [2024-06-21 17:13:23,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3751, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4033, PETRI_PLACES=249, PETRI_TRANSITIONS=368} [2024-06-21 17:13:23,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-21 17:13:23,691 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 368 transitions, 4033 flow [2024-06-21 17:13:23,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:23,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:23,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:23,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 17:13:23,691 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:23,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:23,692 INFO L85 PathProgramCache]: Analyzing trace with hash 252547774, now seen corresponding path program 6 times [2024-06-21 17:13:23,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:23,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646858625] [2024-06-21 17:13:23,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:23,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:25,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:25,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:25,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646858625] [2024-06-21 17:13:25,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646858625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:25,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:25,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:13:25,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773387933] [2024-06-21 17:13:25,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:25,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:13:25,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:25,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:13:25,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:13:26,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:26,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 368 transitions, 4033 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:26,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:26,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:26,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:27,811 INFO L124 PetriNetUnfolderBase]: 3817/6276 cut-off events. [2024-06-21 17:13:27,811 INFO L125 PetriNetUnfolderBase]: For 366512/366520 co-relation queries the response was YES. [2024-06-21 17:13:27,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38497 conditions, 6276 events. 3817/6276 cut-off events. For 366512/366520 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 40899 event pairs, 833 based on Foata normal form. 14/6266 useless extension candidates. Maximal degree in co-relation 38379. Up to 5281 conditions per place. [2024-06-21 17:13:27,879 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 268 selfloop transitions, 124 changer transitions 0/397 dead transitions. [2024-06-21 17:13:27,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 397 transitions, 4919 flow [2024-06-21 17:13:27,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:13:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:13:27,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:13:27,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:13:27,880 INFO L175 Difference]: Start difference. First operand has 249 places, 368 transitions, 4033 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:13:27,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 397 transitions, 4919 flow [2024-06-21 17:13:28,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 397 transitions, 4609 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 17:13:28,689 INFO L231 Difference]: Finished difference. Result has 250 places, 368 transitions, 3986 flow [2024-06-21 17:13:28,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3723, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3986, PETRI_PLACES=250, PETRI_TRANSITIONS=368} [2024-06-21 17:13:28,690 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-21 17:13:28,690 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 368 transitions, 3986 flow [2024-06-21 17:13:28,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:28,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:28,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:28,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 17:13:28,690 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:28,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:28,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1007115886, now seen corresponding path program 7 times [2024-06-21 17:13:28,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:28,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134052270] [2024-06-21 17:13:28,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:28,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:30,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:30,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134052270] [2024-06-21 17:13:30,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134052270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:30,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:30,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:13:30,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155353001] [2024-06-21 17:13:30,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:30,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:13:30,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:30,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:13:30,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:13:30,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:30,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 368 transitions, 3986 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:30,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:30,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:30,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:33,007 INFO L124 PetriNetUnfolderBase]: 3843/6325 cut-off events. [2024-06-21 17:13:33,007 INFO L125 PetriNetUnfolderBase]: For 364656/364664 co-relation queries the response was YES. [2024-06-21 17:13:33,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38817 conditions, 6325 events. 3843/6325 cut-off events. For 364656/364664 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 41475 event pairs, 746 based on Foata normal form. 8/6313 useless extension candidates. Maximal degree in co-relation 38698. Up to 4991 conditions per place. [2024-06-21 17:13:33,077 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 250 selfloop transitions, 176 changer transitions 0/431 dead transitions. [2024-06-21 17:13:33,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 431 transitions, 5634 flow [2024-06-21 17:13:33,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:13:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:13:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 17:13:33,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:13:33,078 INFO L175 Difference]: Start difference. First operand has 250 places, 368 transitions, 3986 flow. Second operand 8 states and 147 transitions. [2024-06-21 17:13:33,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 431 transitions, 5634 flow [2024-06-21 17:13:33,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 431 transitions, 5354 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 17:13:33,779 INFO L231 Difference]: Finished difference. Result has 253 places, 398 transitions, 4607 flow [2024-06-21 17:13:33,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3726, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4607, PETRI_PLACES=253, PETRI_TRANSITIONS=398} [2024-06-21 17:13:33,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-21 17:13:33,780 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 398 transitions, 4607 flow [2024-06-21 17:13:33,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:33,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:33,780 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] [2024-06-21 17:13:33,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 17:13:33,781 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:33,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:33,781 INFO L85 PathProgramCache]: Analyzing trace with hash 408818464, now seen corresponding path program 8 times [2024-06-21 17:13:33,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:33,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493620988] [2024-06-21 17:13:33,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:33,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:36,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:36,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493620988] [2024-06-21 17:13:36,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493620988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:36,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:36,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:13:36,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209178549] [2024-06-21 17:13:36,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:36,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:13:36,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:36,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:13:36,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:13:36,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:36,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 398 transitions, 4607 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:36,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:36,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:36,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:38,068 INFO L124 PetriNetUnfolderBase]: 3869/6364 cut-off events. [2024-06-21 17:13:38,068 INFO L125 PetriNetUnfolderBase]: For 385130/385132 co-relation queries the response was YES. [2024-06-21 17:13:38,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40802 conditions, 6364 events. 3869/6364 cut-off events. For 385130/385132 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 41689 event pairs, 754 based on Foata normal form. 2/6346 useless extension candidates. Maximal degree in co-relation 40680. Up to 5006 conditions per place. [2024-06-21 17:13:38,139 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 249 selfloop transitions, 179 changer transitions 0/433 dead transitions. [2024-06-21 17:13:38,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 433 transitions, 6179 flow [2024-06-21 17:13:38,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:13:38,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:13:38,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:13:38,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 17:13:38,140 INFO L175 Difference]: Start difference. First operand has 253 places, 398 transitions, 4607 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:13:38,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 433 transitions, 6179 flow [2024-06-21 17:13:39,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 433 transitions, 5935 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-21 17:13:39,037 INFO L231 Difference]: Finished difference. Result has 257 places, 404 transitions, 4893 flow [2024-06-21 17:13:39,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4391, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4893, PETRI_PLACES=257, PETRI_TRANSITIONS=404} [2024-06-21 17:13:39,038 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-21 17:13:39,038 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 404 transitions, 4893 flow [2024-06-21 17:13:39,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:39,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:39,038 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] [2024-06-21 17:13:39,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 17:13:39,038 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:39,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:39,038 INFO L85 PathProgramCache]: Analyzing trace with hash -863462506, now seen corresponding path program 9 times [2024-06-21 17:13:39,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:39,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313039170] [2024-06-21 17:13:39,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:39,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:41,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:41,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313039170] [2024-06-21 17:13:41,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313039170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:41,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:41,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:13:41,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526038833] [2024-06-21 17:13:41,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:41,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:13:41,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:41,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:13:41,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:13:41,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:41,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 404 transitions, 4893 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:41,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:41,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:41,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:43,394 INFO L124 PetriNetUnfolderBase]: 3863/6356 cut-off events. [2024-06-21 17:13:43,394 INFO L125 PetriNetUnfolderBase]: For 384401/384403 co-relation queries the response was YES. [2024-06-21 17:13:43,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40693 conditions, 6356 events. 3863/6356 cut-off events. For 384401/384403 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 41603 event pairs, 768 based on Foata normal form. 2/6338 useless extension candidates. Maximal degree in co-relation 40570. Up to 5003 conditions per place. [2024-06-21 17:13:43,463 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 250 selfloop transitions, 177 changer transitions 0/432 dead transitions. [2024-06-21 17:13:43,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 432 transitions, 6147 flow [2024-06-21 17:13:43,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:13:43,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:13:43,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:13:43,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 17:13:43,465 INFO L175 Difference]: Start difference. First operand has 257 places, 404 transitions, 4893 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:13:43,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 432 transitions, 6147 flow [2024-06-21 17:13:44,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 432 transitions, 5797 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-21 17:13:44,399 INFO L231 Difference]: Finished difference. Result has 261 places, 404 transitions, 4903 flow [2024-06-21 17:13:44,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4543, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4903, PETRI_PLACES=261, PETRI_TRANSITIONS=404} [2024-06-21 17:13:44,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-21 17:13:44,399 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 404 transitions, 4903 flow [2024-06-21 17:13:44,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:44,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:44,400 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] [2024-06-21 17:13:44,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 17:13:44,400 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:44,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:44,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1865204832, now seen corresponding path program 10 times [2024-06-21 17:13:44,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:44,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052130805] [2024-06-21 17:13:44,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:44,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:46,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:46,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:46,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052130805] [2024-06-21 17:13:46,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052130805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:46,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:46,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:13:46,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889023597] [2024-06-21 17:13:46,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:46,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:13:46,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:46,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:13:46,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:13:46,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:46,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 404 transitions, 4903 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:46,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:46,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:46,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:48,749 INFO L124 PetriNetUnfolderBase]: 3889/6416 cut-off events. [2024-06-21 17:13:48,749 INFO L125 PetriNetUnfolderBase]: For 401141/401174 co-relation queries the response was YES. [2024-06-21 17:13:48,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41266 conditions, 6416 events. 3889/6416 cut-off events. For 401141/401174 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 42043 event pairs, 814 based on Foata normal form. 4/6399 useless extension candidates. Maximal degree in co-relation 41142. Up to 5018 conditions per place. [2024-06-21 17:13:48,823 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 259 selfloop transitions, 170 changer transitions 0/434 dead transitions. [2024-06-21 17:13:48,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 434 transitions, 6472 flow [2024-06-21 17:13:48,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:13:48,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:13:48,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:13:48,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 17:13:48,824 INFO L175 Difference]: Start difference. First operand has 261 places, 404 transitions, 4903 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:13:48,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 434 transitions, 6472 flow [2024-06-21 17:13:49,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 434 transitions, 6061 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 17:13:49,733 INFO L231 Difference]: Finished difference. Result has 263 places, 413 transitions, 5083 flow [2024-06-21 17:13:49,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4506, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5083, PETRI_PLACES=263, PETRI_TRANSITIONS=413} [2024-06-21 17:13:49,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-21 17:13:49,733 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 413 transitions, 5083 flow [2024-06-21 17:13:49,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:49,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:49,733 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] [2024-06-21 17:13:49,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 17:13:49,734 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:49,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:49,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1157607536, now seen corresponding path program 11 times [2024-06-21 17:13:49,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:49,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324840425] [2024-06-21 17:13:49,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:49,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:51,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:51,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324840425] [2024-06-21 17:13:51,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324840425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:51,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:51,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:13:51,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096821341] [2024-06-21 17:13:51,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:51,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:13:51,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:51,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:13:51,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:13:51,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:51,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 413 transitions, 5083 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:51,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:51,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:51,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:53,964 INFO L124 PetriNetUnfolderBase]: 3883/6420 cut-off events. [2024-06-21 17:13:53,964 INFO L125 PetriNetUnfolderBase]: For 403465/403498 co-relation queries the response was YES. [2024-06-21 17:13:54,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41238 conditions, 6420 events. 3883/6420 cut-off events. For 403465/403498 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 42260 event pairs, 820 based on Foata normal form. 4/6403 useless extension candidates. Maximal degree in co-relation 41112. Up to 5015 conditions per place. [2024-06-21 17:13:54,033 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 255 selfloop transitions, 173 changer transitions 0/433 dead transitions. [2024-06-21 17:13:54,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 433 transitions, 6307 flow [2024-06-21 17:13:54,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:13:54,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:13:54,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:13:54,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 17:13:54,034 INFO L175 Difference]: Start difference. First operand has 263 places, 413 transitions, 5083 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:13:54,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 433 transitions, 6307 flow [2024-06-21 17:13:55,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 433 transitions, 5960 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-21 17:13:55,086 INFO L231 Difference]: Finished difference. Result has 267 places, 413 transitions, 5088 flow [2024-06-21 17:13:55,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4736, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5088, PETRI_PLACES=267, PETRI_TRANSITIONS=413} [2024-06-21 17:13:55,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-21 17:13:55,087 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 413 transitions, 5088 flow [2024-06-21 17:13:55,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:55,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:55,087 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] [2024-06-21 17:13:55,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 17:13:55,088 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:13:55,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:55,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1256910018, now seen corresponding path program 12 times [2024-06-21 17:13:55,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:55,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641872723] [2024-06-21 17:13:55,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:55,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:57,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:57,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641872723] [2024-06-21 17:13:57,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641872723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:57,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:57,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:13:57,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521514127] [2024-06-21 17:13:57,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:57,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:13:57,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:57,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:13:57,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:13:57,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:13:57,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 413 transitions, 5088 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:13:57,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:57,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:13:57,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:59,556 INFO L124 PetriNetUnfolderBase]: 3871/6392 cut-off events. [2024-06-21 17:13:59,556 INFO L125 PetriNetUnfolderBase]: For 405661/405694 co-relation queries the response was YES. [2024-06-21 17:13:59,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40635 conditions, 6392 events. 3871/6392 cut-off events. For 405661/405694 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 41950 event pairs, 817 based on Foata normal form. 6/6377 useless extension candidates. Maximal degree in co-relation 40508. Up to 5007 conditions per place. [2024-06-21 17:13:59,630 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 268 selfloop transitions, 160 changer transitions 0/433 dead transitions. [2024-06-21 17:13:59,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 433 transitions, 6316 flow [2024-06-21 17:13:59,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:13:59,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:13:59,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:13:59,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 17:13:59,631 INFO L175 Difference]: Start difference. First operand has 267 places, 413 transitions, 5088 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:13:59,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 433 transitions, 6316 flow [2024-06-21 17:14:00,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 433 transitions, 5880 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 17:14:00,949 INFO L231 Difference]: Finished difference. Result has 268 places, 413 transitions, 4979 flow [2024-06-21 17:14:00,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4652, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4979, PETRI_PLACES=268, PETRI_TRANSITIONS=413} [2024-06-21 17:14:00,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-21 17:14:00,949 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 413 transitions, 4979 flow [2024-06-21 17:14:00,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:00,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:00,950 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] [2024-06-21 17:14:00,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 17:14:00,950 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:00,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:00,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1269698820, now seen corresponding path program 2 times [2024-06-21 17:14:00,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:00,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915961003] [2024-06-21 17:14:00,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:00,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:04,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:04,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915961003] [2024-06-21 17:14:04,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915961003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:04,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:04,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:14:04,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797091065] [2024-06-21 17:14:04,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:04,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:14:04,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:04,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:14:04,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:14:04,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:04,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 413 transitions, 4979 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:04,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:04,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:04,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:05,769 INFO L124 PetriNetUnfolderBase]: 3990/6579 cut-off events. [2024-06-21 17:14:05,769 INFO L125 PetriNetUnfolderBase]: For 484151/484184 co-relation queries the response was YES. [2024-06-21 17:14:05,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43028 conditions, 6579 events. 3990/6579 cut-off events. For 484151/484184 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 43284 event pairs, 759 based on Foata normal form. 28/6588 useless extension candidates. Maximal degree in co-relation 42900. Up to 5487 conditions per place. [2024-06-21 17:14:05,849 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 360 selfloop transitions, 77 changer transitions 0/442 dead transitions. [2024-06-21 17:14:05,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 442 transitions, 6241 flow [2024-06-21 17:14:05,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:14:05,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:14:05,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:14:05,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 17:14:05,850 INFO L175 Difference]: Start difference. First operand has 268 places, 413 transitions, 4979 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:14:05,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 442 transitions, 6241 flow [2024-06-21 17:14:06,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 442 transitions, 5945 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 17:14:06,964 INFO L231 Difference]: Finished difference. Result has 270 places, 417 transitions, 4991 flow [2024-06-21 17:14:06,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4683, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4991, PETRI_PLACES=270, PETRI_TRANSITIONS=417} [2024-06-21 17:14:06,965 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-21 17:14:06,965 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 417 transitions, 4991 flow [2024-06-21 17:14:06,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:06,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:06,965 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] [2024-06-21 17:14:06,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 17:14:06,965 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:06,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:06,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1700015400, now seen corresponding path program 3 times [2024-06-21 17:14:06,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:06,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6395009] [2024-06-21 17:14:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:06,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:09,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:09,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6395009] [2024-06-21 17:14:09,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6395009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:09,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:09,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:14:09,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765637473] [2024-06-21 17:14:09,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:09,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:14:09,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:09,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:14:09,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:14:09,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:09,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 417 transitions, 4991 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:09,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:09,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:09,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:11,824 INFO L124 PetriNetUnfolderBase]: 4024/6639 cut-off events. [2024-06-21 17:14:11,825 INFO L125 PetriNetUnfolderBase]: For 487408/487441 co-relation queries the response was YES. [2024-06-21 17:14:11,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43230 conditions, 6639 events. 4024/6639 cut-off events. For 487408/487441 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 43666 event pairs, 765 based on Foata normal form. 28/6648 useless extension candidates. Maximal degree in co-relation 43101. Up to 4963 conditions per place. [2024-06-21 17:14:11,900 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 356 selfloop transitions, 87 changer transitions 0/448 dead transitions. [2024-06-21 17:14:11,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 448 transitions, 6415 flow [2024-06-21 17:14:11,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:14:11,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:14:11,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:14:11,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 17:14:11,901 INFO L175 Difference]: Start difference. First operand has 270 places, 417 transitions, 4991 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:14:11,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 448 transitions, 6415 flow [2024-06-21 17:14:13,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 448 transitions, 6257 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 17:14:13,102 INFO L231 Difference]: Finished difference. Result has 275 places, 420 transitions, 5125 flow [2024-06-21 17:14:13,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4833, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5125, PETRI_PLACES=275, PETRI_TRANSITIONS=420} [2024-06-21 17:14:13,103 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-21 17:14:13,103 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 420 transitions, 5125 flow [2024-06-21 17:14:13,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:13,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:13,103 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] [2024-06-21 17:14:13,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 17:14:13,103 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:13,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:13,104 INFO L85 PathProgramCache]: Analyzing trace with hash -2088426654, now seen corresponding path program 1 times [2024-06-21 17:14:13,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:13,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217267612] [2024-06-21 17:14:13,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:13,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:16,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:16,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217267612] [2024-06-21 17:14:16,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217267612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:16,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:16,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:14:16,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338015302] [2024-06-21 17:14:16,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:16,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:14:16,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:16,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:14:16,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:14:16,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:16,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 420 transitions, 5125 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:16,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:16,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:16,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:18,203 INFO L124 PetriNetUnfolderBase]: 4032/6649 cut-off events. [2024-06-21 17:14:18,203 INFO L125 PetriNetUnfolderBase]: For 463436/463438 co-relation queries the response was YES. [2024-06-21 17:14:18,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43553 conditions, 6649 events. 4032/6649 cut-off events. For 463436/463438 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 43816 event pairs, 937 based on Foata normal form. 2/6648 useless extension candidates. Maximal degree in co-relation 43421. Up to 6179 conditions per place. [2024-06-21 17:14:18,274 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 414 selfloop transitions, 29 changer transitions 0/448 dead transitions. [2024-06-21 17:14:18,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 448 transitions, 6119 flow [2024-06-21 17:14:18,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:14:18,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:14:18,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 17:14:18,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 17:14:18,275 INFO L175 Difference]: Start difference. First operand has 275 places, 420 transitions, 5125 flow. Second operand 8 states and 134 transitions. [2024-06-21 17:14:18,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 448 transitions, 6119 flow [2024-06-21 17:14:19,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 448 transitions, 5831 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-21 17:14:19,159 INFO L231 Difference]: Finished difference. Result has 277 places, 422 transitions, 4944 flow [2024-06-21 17:14:19,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4837, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4944, PETRI_PLACES=277, PETRI_TRANSITIONS=422} [2024-06-21 17:14:19,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-21 17:14:19,159 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 422 transitions, 4944 flow [2024-06-21 17:14:19,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:19,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:19,160 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] [2024-06-21 17:14:19,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 17:14:19,160 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:19,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:19,160 INFO L85 PathProgramCache]: Analyzing trace with hash 409035154, now seen corresponding path program 2 times [2024-06-21 17:14:19,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:19,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156906208] [2024-06-21 17:14:19,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:19,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:22,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:22,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156906208] [2024-06-21 17:14:22,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156906208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:22,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:22,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:14:22,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512469476] [2024-06-21 17:14:22,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:22,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:14:22,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:22,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:14:22,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:14:22,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:22,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 422 transitions, 4944 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:22,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:22,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:22,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:24,404 INFO L124 PetriNetUnfolderBase]: 4040/6661 cut-off events. [2024-06-21 17:14:24,404 INFO L125 PetriNetUnfolderBase]: For 473903/473905 co-relation queries the response was YES. [2024-06-21 17:14:24,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42597 conditions, 6661 events. 4040/6661 cut-off events. For 473903/473905 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 43854 event pairs, 939 based on Foata normal form. 2/6660 useless extension candidates. Maximal degree in co-relation 42465. Up to 6191 conditions per place. [2024-06-21 17:14:24,469 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 413 selfloop transitions, 28 changer transitions 0/446 dead transitions. [2024-06-21 17:14:24,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 446 transitions, 5926 flow [2024-06-21 17:14:24,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:14:24,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:14:24,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 17:14:24,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 17:14:24,470 INFO L175 Difference]: Start difference. First operand has 277 places, 422 transitions, 4944 flow. Second operand 8 states and 131 transitions. [2024-06-21 17:14:24,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 446 transitions, 5926 flow [2024-06-21 17:14:25,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 446 transitions, 5835 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 17:14:25,683 INFO L231 Difference]: Finished difference. Result has 279 places, 424 transitions, 4962 flow [2024-06-21 17:14:25,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4853, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4962, PETRI_PLACES=279, PETRI_TRANSITIONS=424} [2024-06-21 17:14:25,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-21 17:14:25,684 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 424 transitions, 4962 flow [2024-06-21 17:14:25,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:25,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:25,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:25,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 17:14:25,684 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:25,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:25,684 INFO L85 PathProgramCache]: Analyzing trace with hash 843179118, now seen corresponding path program 3 times [2024-06-21 17:14:25,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:25,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519889190] [2024-06-21 17:14:25,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:25,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:28,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:28,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519889190] [2024-06-21 17:14:28,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519889190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:28,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:28,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:14:28,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842813665] [2024-06-21 17:14:28,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:28,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:14:28,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:28,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:14:28,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:14:28,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:28,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 424 transitions, 4962 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:28,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:28,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:28,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:30,572 INFO L124 PetriNetUnfolderBase]: 4048/6673 cut-off events. [2024-06-21 17:14:30,572 INFO L125 PetriNetUnfolderBase]: For 485990/485992 co-relation queries the response was YES. [2024-06-21 17:14:30,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42936 conditions, 6673 events. 4048/6673 cut-off events. For 485990/485992 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 43920 event pairs, 937 based on Foata normal form. 2/6672 useless extension candidates. Maximal degree in co-relation 42803. Up to 6183 conditions per place. [2024-06-21 17:14:30,649 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 410 selfloop transitions, 33 changer transitions 0/448 dead transitions. [2024-06-21 17:14:30,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 448 transitions, 5952 flow [2024-06-21 17:14:30,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:14:30,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:14:30,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 17:14:30,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 17:14:30,651 INFO L175 Difference]: Start difference. First operand has 279 places, 424 transitions, 4962 flow. Second operand 8 states and 131 transitions. [2024-06-21 17:14:30,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 448 transitions, 5952 flow [2024-06-21 17:14:31,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 448 transitions, 5859 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 17:14:31,780 INFO L231 Difference]: Finished difference. Result has 281 places, 426 transitions, 4992 flow [2024-06-21 17:14:31,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4869, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4992, PETRI_PLACES=281, PETRI_TRANSITIONS=426} [2024-06-21 17:14:31,781 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-21 17:14:31,781 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 426 transitions, 4992 flow [2024-06-21 17:14:31,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:31,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:31,781 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] [2024-06-21 17:14:31,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 17:14:31,781 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:31,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:31,781 INFO L85 PathProgramCache]: Analyzing trace with hash 2122159182, now seen corresponding path program 4 times [2024-06-21 17:14:31,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:31,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066760619] [2024-06-21 17:14:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:31,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:34,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:34,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066760619] [2024-06-21 17:14:34,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066760619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:34,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:34,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:14:34,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912147480] [2024-06-21 17:14:34,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:34,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:14:34,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:34,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:14:34,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:14:35,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:35,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 426 transitions, 4992 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:35,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:35,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:35,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:36,995 INFO L124 PetriNetUnfolderBase]: 4056/6691 cut-off events. [2024-06-21 17:14:36,995 INFO L125 PetriNetUnfolderBase]: For 497890/497895 co-relation queries the response was YES. [2024-06-21 17:14:37,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43309 conditions, 6691 events. 4056/6691 cut-off events. For 497890/497895 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 44150 event pairs, 940 based on Foata normal form. 4/6690 useless extension candidates. Maximal degree in co-relation 43175. Up to 6215 conditions per place. [2024-06-21 17:14:37,077 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 412 selfloop transitions, 28 changer transitions 0/445 dead transitions. [2024-06-21 17:14:37,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 445 transitions, 5966 flow [2024-06-21 17:14:37,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:14:37,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:14:37,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 17:14:37,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 17:14:37,079 INFO L175 Difference]: Start difference. First operand has 281 places, 426 transitions, 4992 flow. Second operand 8 states and 126 transitions. [2024-06-21 17:14:37,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 445 transitions, 5966 flow [2024-06-21 17:14:38,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 445 transitions, 5859 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 17:14:38,223 INFO L231 Difference]: Finished difference. Result has 283 places, 428 transitions, 5002 flow [2024-06-21 17:14:38,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4885, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5002, PETRI_PLACES=283, PETRI_TRANSITIONS=428} [2024-06-21 17:14:38,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-21 17:14:38,223 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 428 transitions, 5002 flow [2024-06-21 17:14:38,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:38,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:38,224 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] [2024-06-21 17:14:38,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 17:14:38,224 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:38,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:38,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1441652658, now seen corresponding path program 5 times [2024-06-21 17:14:38,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:38,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933855585] [2024-06-21 17:14:38,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:38,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:41,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:41,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:41,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933855585] [2024-06-21 17:14:41,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933855585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:41,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:41,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:14:41,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237639569] [2024-06-21 17:14:41,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:41,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:14:41,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:41,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:14:41,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:14:41,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:41,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 428 transitions, 5002 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:41,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:41,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:41,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:43,342 INFO L124 PetriNetUnfolderBase]: 4064/6703 cut-off events. [2024-06-21 17:14:43,342 INFO L125 PetriNetUnfolderBase]: For 510152/510157 co-relation queries the response was YES. [2024-06-21 17:14:43,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43634 conditions, 6703 events. 4064/6703 cut-off events. For 510152/510157 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 44169 event pairs, 940 based on Foata normal form. 4/6702 useless extension candidates. Maximal degree in co-relation 43499. Up to 6213 conditions per place. [2024-06-21 17:14:43,417 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 411 selfloop transitions, 31 changer transitions 0/447 dead transitions. [2024-06-21 17:14:43,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 447 transitions, 5984 flow [2024-06-21 17:14:43,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:14:43,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:14:43,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 17:14:43,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-21 17:14:43,418 INFO L175 Difference]: Start difference. First operand has 283 places, 428 transitions, 5002 flow. Second operand 8 states and 127 transitions. [2024-06-21 17:14:43,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 447 transitions, 5984 flow [2024-06-21 17:14:44,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 447 transitions, 5883 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 17:14:44,730 INFO L231 Difference]: Finished difference. Result has 285 places, 430 transitions, 5028 flow [2024-06-21 17:14:44,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4901, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5028, PETRI_PLACES=285, PETRI_TRANSITIONS=430} [2024-06-21 17:14:44,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-21 17:14:44,730 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 430 transitions, 5028 flow [2024-06-21 17:14:44,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:44,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:44,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:44,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 17:14:44,731 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:44,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:44,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1700200098, now seen corresponding path program 6 times [2024-06-21 17:14:44,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:44,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370085598] [2024-06-21 17:14:44,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:44,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:47,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:47,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370085598] [2024-06-21 17:14:47,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370085598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:47,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:47,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:14:47,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801413040] [2024-06-21 17:14:47,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:47,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:14:47,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:47,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:14:47,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:14:47,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:47,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 430 transitions, 5028 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:47,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:47,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:47,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:49,647 INFO L124 PetriNetUnfolderBase]: 4059/6694 cut-off events. [2024-06-21 17:14:49,647 INFO L125 PetriNetUnfolderBase]: For 514483/514488 co-relation queries the response was YES. [2024-06-21 17:14:49,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43609 conditions, 6694 events. 4059/6694 cut-off events. For 514483/514488 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 44221 event pairs, 912 based on Foata normal form. 4/6693 useless extension candidates. Maximal degree in co-relation 43473. Up to 6158 conditions per place. [2024-06-21 17:14:49,720 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 402 selfloop transitions, 42 changer transitions 0/449 dead transitions. [2024-06-21 17:14:49,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 449 transitions, 6018 flow [2024-06-21 17:14:49,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:14:49,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:14:49,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 17:14:49,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 17:14:49,722 INFO L175 Difference]: Start difference. First operand has 285 places, 430 transitions, 5028 flow. Second operand 8 states and 126 transitions. [2024-06-21 17:14:49,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 449 transitions, 6018 flow [2024-06-21 17:14:51,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 449 transitions, 5907 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 17:14:51,036 INFO L231 Difference]: Finished difference. Result has 287 places, 432 transitions, 5070 flow [2024-06-21 17:14:51,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4917, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5070, PETRI_PLACES=287, PETRI_TRANSITIONS=432} [2024-06-21 17:14:51,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-21 17:14:51,037 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 432 transitions, 5070 flow [2024-06-21 17:14:51,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:51,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:51,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:51,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 17:14:51,037 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:51,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:51,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1946916659, now seen corresponding path program 1 times [2024-06-21 17:14:51,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:51,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035776502] [2024-06-21 17:14:51,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:51,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:53,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:53,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035776502] [2024-06-21 17:14:53,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035776502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:53,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:53,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:14:53,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813055836] [2024-06-21 17:14:53,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:53,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:14:53,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:53,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:14:53,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:14:53,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:53,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 432 transitions, 5070 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:53,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:53,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:53,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:55,473 INFO L124 PetriNetUnfolderBase]: 4131/6805 cut-off events. [2024-06-21 17:14:55,473 INFO L125 PetriNetUnfolderBase]: For 566370/566379 co-relation queries the response was YES. [2024-06-21 17:14:55,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44769 conditions, 6805 events. 4131/6805 cut-off events. For 566370/566379 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 44946 event pairs, 856 based on Foata normal form. 14/6813 useless extension candidates. Maximal degree in co-relation 44632. Up to 5191 conditions per place. [2024-06-21 17:14:55,555 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 240 selfloop transitions, 248 changer transitions 0/493 dead transitions. [2024-06-21 17:14:55,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 493 transitions, 6764 flow [2024-06-21 17:14:55,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:14:55,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:14:55,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-21 17:14:55,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-06-21 17:14:55,556 INFO L175 Difference]: Start difference. First operand has 287 places, 432 transitions, 5070 flow. Second operand 11 states and 200 transitions. [2024-06-21 17:14:55,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 493 transitions, 6764 flow [2024-06-21 17:14:56,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 493 transitions, 6627 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 17:14:56,951 INFO L231 Difference]: Finished difference. Result has 292 places, 450 transitions, 5687 flow [2024-06-21 17:14:56,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4933, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5687, PETRI_PLACES=292, PETRI_TRANSITIONS=450} [2024-06-21 17:14:56,951 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-21 17:14:56,952 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 450 transitions, 5687 flow [2024-06-21 17:14:56,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:56,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:56,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:56,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 17:14:56,952 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:56,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:56,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1946766929, now seen corresponding path program 2 times [2024-06-21 17:14:56,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:56,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635403740] [2024-06-21 17:14:56,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:56,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:59,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:59,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635403740] [2024-06-21 17:14:59,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635403740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:59,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:59,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:14:59,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986398125] [2024-06-21 17:14:59,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:59,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:14:59,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:59,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:14:59,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:14:59,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:59,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 450 transitions, 5687 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:59,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:59,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:59,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:01,292 INFO L124 PetriNetUnfolderBase]: 4215/6937 cut-off events. [2024-06-21 17:15:01,292 INFO L125 PetriNetUnfolderBase]: For 597675/597684 co-relation queries the response was YES. [2024-06-21 17:15:01,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47328 conditions, 6937 events. 4215/6937 cut-off events. For 597675/597684 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 45871 event pairs, 856 based on Foata normal form. 10/6941 useless extension candidates. Maximal degree in co-relation 47190. Up to 5271 conditions per place. [2024-06-21 17:15:01,376 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 236 selfloop transitions, 264 changer transitions 0/505 dead transitions. [2024-06-21 17:15:01,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 505 transitions, 7425 flow [2024-06-21 17:15:01,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:15:01,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:15:01,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 17:15:01,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 17:15:01,377 INFO L175 Difference]: Start difference. First operand has 292 places, 450 transitions, 5687 flow. Second operand 10 states and 185 transitions. [2024-06-21 17:15:01,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 505 transitions, 7425 flow [2024-06-21 17:15:02,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 505 transitions, 6756 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-21 17:15:02,815 INFO L231 Difference]: Finished difference. Result has 294 places, 468 transitions, 5831 flow [2024-06-21 17:15:02,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5086, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5831, PETRI_PLACES=294, PETRI_TRANSITIONS=468} [2024-06-21 17:15:02,816 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-21 17:15:02,816 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 468 transitions, 5831 flow [2024-06-21 17:15:02,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:02,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:02,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:02,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 17:15:02,816 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:02,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:02,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1356822679, now seen corresponding path program 3 times [2024-06-21 17:15:02,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:02,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167611078] [2024-06-21 17:15:02,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:02,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:05,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:05,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167611078] [2024-06-21 17:15:05,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167611078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:05,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:05,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:15:05,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779148174] [2024-06-21 17:15:05,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:05,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:15:05,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:05,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:15:05,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:15:05,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:15:05,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 468 transitions, 5831 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:05,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:05,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:15:05,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:08,123 INFO L124 PetriNetUnfolderBase]: 4319/7075 cut-off events. [2024-06-21 17:15:08,123 INFO L125 PetriNetUnfolderBase]: For 659241/659250 co-relation queries the response was YES. [2024-06-21 17:15:08,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48849 conditions, 7075 events. 4319/7075 cut-off events. For 659241/659250 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 46735 event pairs, 857 based on Foata normal form. 12/7081 useless extension candidates. Maximal degree in co-relation 48710. Up to 5371 conditions per place. [2024-06-21 17:15:08,201 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 251 selfloop transitions, 283 changer transitions 0/539 dead transitions. [2024-06-21 17:15:08,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 539 transitions, 7719 flow [2024-06-21 17:15:08,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:15:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:15:08,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 226 transitions. [2024-06-21 17:15:08,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139194139194139 [2024-06-21 17:15:08,202 INFO L175 Difference]: Start difference. First operand has 294 places, 468 transitions, 5831 flow. Second operand 13 states and 226 transitions. [2024-06-21 17:15:08,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 539 transitions, 7719 flow [2024-06-21 17:15:09,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 539 transitions, 7264 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:15:09,724 INFO L231 Difference]: Finished difference. Result has 301 places, 492 transitions, 6284 flow [2024-06-21 17:15:09,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5400, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6284, PETRI_PLACES=301, PETRI_TRANSITIONS=492} [2024-06-21 17:15:09,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-21 17:15:09,724 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 492 transitions, 6284 flow [2024-06-21 17:15:09,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:09,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:09,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:09,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 17:15:09,725 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:09,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:09,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1729902434, now seen corresponding path program 1 times [2024-06-21 17:15:09,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:09,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970209121] [2024-06-21 17:15:09,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:09,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:12,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:12,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970209121] [2024-06-21 17:15:12,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970209121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:12,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:12,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:15:12,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670841469] [2024-06-21 17:15:12,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:12,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:15:12,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:12,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:15:12,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:15:12,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:15:12,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 492 transitions, 6284 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:12,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:12,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:15:12,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:15,368 INFO L124 PetriNetUnfolderBase]: 4403/7202 cut-off events. [2024-06-21 17:15:15,369 INFO L125 PetriNetUnfolderBase]: For 692160/692169 co-relation queries the response was YES. [2024-06-21 17:15:15,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50783 conditions, 7202 events. 4403/7202 cut-off events. For 692160/692169 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 47666 event pairs, 879 based on Foata normal form. 8/7204 useless extension candidates. Maximal degree in co-relation 50643. Up to 5275 conditions per place. [2024-06-21 17:15:15,452 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 271 selfloop transitions, 269 changer transitions 0/545 dead transitions. [2024-06-21 17:15:15,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 545 transitions, 8090 flow [2024-06-21 17:15:15,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:15:15,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:15:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 210 transitions. [2024-06-21 17:15:15,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:15:15,453 INFO L175 Difference]: Start difference. First operand has 301 places, 492 transitions, 6284 flow. Second operand 12 states and 210 transitions. [2024-06-21 17:15:15,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 545 transitions, 8090 flow [2024-06-21 17:15:17,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 545 transitions, 7636 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-21 17:15:17,089 INFO L231 Difference]: Finished difference. Result has 305 places, 503 transitions, 6613 flow [2024-06-21 17:15:17,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5830, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6613, PETRI_PLACES=305, PETRI_TRANSITIONS=503} [2024-06-21 17:15:17,090 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-21 17:15:17,090 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 503 transitions, 6613 flow [2024-06-21 17:15:17,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:17,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:17,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:17,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 17:15:17,090 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:17,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:17,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1941225989, now seen corresponding path program 4 times [2024-06-21 17:15:17,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:17,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422779883] [2024-06-21 17:15:17,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:17,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:19,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:19,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:19,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422779883] [2024-06-21 17:15:19,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422779883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:19,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:19,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:15:19,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356487501] [2024-06-21 17:15:19,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:19,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:15:19,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:19,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:15:19,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:15:19,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:15:19,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 503 transitions, 6613 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:19,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:19,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:15:19,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:22,703 INFO L124 PetriNetUnfolderBase]: 4411/7223 cut-off events. [2024-06-21 17:15:22,703 INFO L125 PetriNetUnfolderBase]: For 711633/711642 co-relation queries the response was YES. [2024-06-21 17:15:22,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51406 conditions, 7223 events. 4411/7223 cut-off events. For 711633/711642 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 47926 event pairs, 867 based on Foata normal form. 12/7229 useless extension candidates. Maximal degree in co-relation 51264. Up to 5497 conditions per place. [2024-06-21 17:15:22,785 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 266 selfloop transitions, 289 changer transitions 0/560 dead transitions. [2024-06-21 17:15:22,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 560 transitions, 8325 flow [2024-06-21 17:15:22,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-21 17:15:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-21 17:15:22,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 253 transitions. [2024-06-21 17:15:22,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015873015873016 [2024-06-21 17:15:22,786 INFO L175 Difference]: Start difference. First operand has 305 places, 503 transitions, 6613 flow. Second operand 15 states and 253 transitions. [2024-06-21 17:15:22,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 560 transitions, 8325 flow [2024-06-21 17:15:24,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 560 transitions, 8031 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-21 17:15:24,393 INFO L231 Difference]: Finished difference. Result has 313 places, 509 transitions, 7005 flow [2024-06-21 17:15:24,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6319, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7005, PETRI_PLACES=313, PETRI_TRANSITIONS=509} [2024-06-21 17:15:24,394 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-21 17:15:24,394 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 509 transitions, 7005 flow [2024-06-21 17:15:24,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:24,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:24,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:24,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 17:15:24,394 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:24,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:24,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1558821909, now seen corresponding path program 5 times [2024-06-21 17:15:24,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:24,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143072698] [2024-06-21 17:15:24,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:24,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:26,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:26,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143072698] [2024-06-21 17:15:26,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143072698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:26,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:26,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:26,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376060051] [2024-06-21 17:15:26,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:26,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:26,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:26,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:26,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:26,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:15:26,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 509 transitions, 7005 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:26,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:26,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:15:26,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:28,586 INFO L124 PetriNetUnfolderBase]: 4399/7219 cut-off events. [2024-06-21 17:15:28,587 INFO L125 PetriNetUnfolderBase]: For 692299/692304 co-relation queries the response was YES. [2024-06-21 17:15:28,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51994 conditions, 7219 events. 4399/7219 cut-off events. For 692299/692304 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 47932 event pairs, 927 based on Foata normal form. 4/7217 useless extension candidates. Maximal degree in co-relation 51850. Up to 5487 conditions per place. [2024-06-21 17:15:28,679 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 252 selfloop transitions, 277 changer transitions 0/534 dead transitions. [2024-06-21 17:15:28,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 534 transitions, 8503 flow [2024-06-21 17:15:28,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:15:28,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:15:28,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 17:15:28,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 17:15:28,680 INFO L175 Difference]: Start difference. First operand has 313 places, 509 transitions, 7005 flow. Second operand 8 states and 146 transitions. [2024-06-21 17:15:28,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 534 transitions, 8503 flow [2024-06-21 17:15:30,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 534 transitions, 7909 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-21 17:15:30,554 INFO L231 Difference]: Finished difference. Result has 308 places, 509 transitions, 6974 flow [2024-06-21 17:15:30,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6411, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6974, PETRI_PLACES=308, PETRI_TRANSITIONS=509} [2024-06-21 17:15:30,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-21 17:15:30,555 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 509 transitions, 6974 flow [2024-06-21 17:15:30,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:30,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:30,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:30,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 17:15:30,555 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:30,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:30,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1781763532, now seen corresponding path program 1 times [2024-06-21 17:15:30,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:30,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647292865] [2024-06-21 17:15:30,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:30,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:33,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:33,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647292865] [2024-06-21 17:15:33,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647292865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:33,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:33,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:15:33,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038775713] [2024-06-21 17:15:33,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:33,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:15:33,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:33,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:15:33,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:15:33,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:15:33,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 509 transitions, 6974 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:33,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:33,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:15:33,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:35,849 INFO L124 PetriNetUnfolderBase]: 4443/7275 cut-off events. [2024-06-21 17:15:35,849 INFO L125 PetriNetUnfolderBase]: For 742740/742747 co-relation queries the response was YES. [2024-06-21 17:15:35,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52527 conditions, 7275 events. 4443/7275 cut-off events. For 742740/742747 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 48386 event pairs, 896 based on Foata normal form. 16/7287 useless extension candidates. Maximal degree in co-relation 52382. Up to 6419 conditions per place. [2024-06-21 17:15:35,943 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 470 selfloop transitions, 72 changer transitions 0/547 dead transitions. [2024-06-21 17:15:35,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 547 transitions, 8241 flow [2024-06-21 17:15:35,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:15:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:15:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 17:15:35,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 17:15:35,944 INFO L175 Difference]: Start difference. First operand has 308 places, 509 transitions, 6974 flow. Second operand 10 states and 170 transitions. [2024-06-21 17:15:35,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 547 transitions, 8241 flow [2024-06-21 17:15:38,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 547 transitions, 7675 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:15:38,023 INFO L231 Difference]: Finished difference. Result has 311 places, 511 transitions, 6621 flow [2024-06-21 17:15:38,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6408, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6621, PETRI_PLACES=311, PETRI_TRANSITIONS=511} [2024-06-21 17:15:38,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-21 17:15:38,023 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 511 transitions, 6621 flow [2024-06-21 17:15:38,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:38,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:38,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:38,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 17:15:38,024 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:38,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:38,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1781770693, now seen corresponding path program 6 times [2024-06-21 17:15:38,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:38,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280272093] [2024-06-21 17:15:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:38,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:40,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:40,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280272093] [2024-06-21 17:15:40,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280272093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:40,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:40,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:15:40,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54859773] [2024-06-21 17:15:40,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:40,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:15:40,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:40,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:15:40,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:15:40,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:15:40,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 511 transitions, 6621 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:40,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:40,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:15:40,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:43,229 INFO L124 PetriNetUnfolderBase]: 4463/7294 cut-off events. [2024-06-21 17:15:43,230 INFO L125 PetriNetUnfolderBase]: For 718121/718126 co-relation queries the response was YES. [2024-06-21 17:15:43,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52079 conditions, 7294 events. 4463/7294 cut-off events. For 718121/718126 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 48296 event pairs, 899 based on Foata normal form. 4/7292 useless extension candidates. Maximal degree in co-relation 51933. Up to 5575 conditions per place. [2024-06-21 17:15:43,327 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 255 selfloop transitions, 291 changer transitions 0/551 dead transitions. [2024-06-21 17:15:43,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 551 transitions, 8085 flow [2024-06-21 17:15:43,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:15:43,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:15:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-21 17:15:43,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41774891774891776 [2024-06-21 17:15:43,328 INFO L175 Difference]: Start difference. First operand has 311 places, 511 transitions, 6621 flow. Second operand 11 states and 193 transitions. [2024-06-21 17:15:43,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 551 transitions, 8085 flow [2024-06-21 17:15:45,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 551 transitions, 7913 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 17:15:45,779 INFO L231 Difference]: Finished difference. Result has 314 places, 517 transitions, 7131 flow [2024-06-21 17:15:45,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6449, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7131, PETRI_PLACES=314, PETRI_TRANSITIONS=517} [2024-06-21 17:15:45,779 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-21 17:15:45,780 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 517 transitions, 7131 flow [2024-06-21 17:15:45,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:45,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:45,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:45,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 17:15:45,780 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:45,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:45,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1936584142, now seen corresponding path program 2 times [2024-06-21 17:15:45,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:45,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390620182] [2024-06-21 17:15:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:45,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:48,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:48,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390620182] [2024-06-21 17:15:48,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390620182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:48,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:48,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:15:48,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543975605] [2024-06-21 17:15:48,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:48,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:15:48,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:48,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:15:48,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:15:48,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:15:48,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 517 transitions, 7131 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:48,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:48,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:15:48,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:51,249 INFO L124 PetriNetUnfolderBase]: 4483/7338 cut-off events. [2024-06-21 17:15:51,249 INFO L125 PetriNetUnfolderBase]: For 735647/735652 co-relation queries the response was YES. [2024-06-21 17:15:51,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53178 conditions, 7338 events. 4483/7338 cut-off events. For 735647/735652 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 48743 event pairs, 905 based on Foata normal form. 4/7336 useless extension candidates. Maximal degree in co-relation 53031. Up to 5367 conditions per place. [2024-06-21 17:15:51,343 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 275 selfloop transitions, 277 changer transitions 0/557 dead transitions. [2024-06-21 17:15:51,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 557 transitions, 8831 flow [2024-06-21 17:15:51,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:15:51,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:15:51,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-21 17:15:51,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-21 17:15:51,345 INFO L175 Difference]: Start difference. First operand has 314 places, 517 transitions, 7131 flow. Second operand 11 states and 196 transitions. [2024-06-21 17:15:51,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 557 transitions, 8831 flow [2024-06-21 17:15:53,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 557 transitions, 8413 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 17:15:53,603 INFO L231 Difference]: Finished difference. Result has 317 places, 521 transitions, 7346 flow [2024-06-21 17:15:53,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6713, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7346, PETRI_PLACES=317, PETRI_TRANSITIONS=521} [2024-06-21 17:15:53,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-21 17:15:53,604 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 521 transitions, 7346 flow [2024-06-21 17:15:53,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:53,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:53,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:53,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 17:15:53,604 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:53,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:53,605 INFO L85 PathProgramCache]: Analyzing trace with hash 174942786, now seen corresponding path program 2 times [2024-06-21 17:15:53,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:53,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439413089] [2024-06-21 17:15:53,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:53,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:53,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:56,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:56,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:56,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439413089] [2024-06-21 17:15:56,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439413089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:56,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:56,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:15:56,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386642520] [2024-06-21 17:15:56,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:56,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:15:56,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:56,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:15:56,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:15:56,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:15:56,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 521 transitions, 7346 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:56,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:56,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:15:56,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:59,149 INFO L124 PetriNetUnfolderBase]: 4527/7431 cut-off events. [2024-06-21 17:15:59,149 INFO L125 PetriNetUnfolderBase]: For 790508/790523 co-relation queries the response was YES. [2024-06-21 17:15:59,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53970 conditions, 7431 events. 4527/7431 cut-off events. For 790508/790523 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 49645 event pairs, 907 based on Foata normal form. 24/7451 useless extension candidates. Maximal degree in co-relation 53822. Up to 6551 conditions per place. [2024-06-21 17:15:59,246 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 482 selfloop transitions, 64 changer transitions 0/551 dead transitions. [2024-06-21 17:15:59,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 551 transitions, 8601 flow [2024-06-21 17:15:59,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:15:59,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:15:59,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:15:59,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 17:15:59,247 INFO L175 Difference]: Start difference. First operand has 317 places, 521 transitions, 7346 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:15:59,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 551 transitions, 8601 flow [2024-06-21 17:16:01,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 551 transitions, 8026 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-21 17:16:01,569 INFO L231 Difference]: Finished difference. Result has 317 places, 523 transitions, 6970 flow [2024-06-21 17:16:01,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6771, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6970, PETRI_PLACES=317, PETRI_TRANSITIONS=523} [2024-06-21 17:16:01,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-21 17:16:01,569 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 523 transitions, 6970 flow [2024-06-21 17:16:01,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:01,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:01,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:01,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 17:16:01,570 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:01,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:01,570 INFO L85 PathProgramCache]: Analyzing trace with hash -707610298, now seen corresponding path program 3 times [2024-06-21 17:16:01,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:01,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377114256] [2024-06-21 17:16:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:01,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:04,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:04,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377114256] [2024-06-21 17:16:04,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377114256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:04,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:04,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:16:04,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742156258] [2024-06-21 17:16:04,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:04,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:16:04,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:04,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:16:04,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:16:04,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:04,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 523 transitions, 6970 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:04,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:04,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:04,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:06,719 INFO L124 PetriNetUnfolderBase]: 4515/7417 cut-off events. [2024-06-21 17:16:06,719 INFO L125 PetriNetUnfolderBase]: For 742467/742472 co-relation queries the response was YES. [2024-06-21 17:16:06,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52755 conditions, 7417 events. 4515/7417 cut-off events. For 742467/742472 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 49526 event pairs, 993 based on Foata normal form. 4/7415 useless extension candidates. Maximal degree in co-relation 52606. Up to 5427 conditions per place. [2024-06-21 17:16:06,806 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 289 selfloop transitions, 256 changer transitions 0/550 dead transitions. [2024-06-21 17:16:06,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 550 transitions, 8370 flow [2024-06-21 17:16:06,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:16:06,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:16:06,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 17:16:06,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-21 17:16:06,808 INFO L175 Difference]: Start difference. First operand has 317 places, 523 transitions, 6970 flow. Second operand 9 states and 158 transitions. [2024-06-21 17:16:06,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 550 transitions, 8370 flow [2024-06-21 17:16:09,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 550 transitions, 8172 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 17:16:09,161 INFO L231 Difference]: Finished difference. Result has 320 places, 523 transitions, 7292 flow [2024-06-21 17:16:09,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6772, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7292, PETRI_PLACES=320, PETRI_TRANSITIONS=523} [2024-06-21 17:16:09,162 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-21 17:16:09,162 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 523 transitions, 7292 flow [2024-06-21 17:16:09,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:09,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:09,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:09,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 17:16:09,163 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:09,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:09,163 INFO L85 PathProgramCache]: Analyzing trace with hash 174704985, now seen corresponding path program 7 times [2024-06-21 17:16:09,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:09,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103481620] [2024-06-21 17:16:09,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:09,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:11,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:11,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103481620] [2024-06-21 17:16:11,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103481620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:11,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:11,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:16:11,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048910351] [2024-06-21 17:16:11,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:11,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:16:11,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:11,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:16:11,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:16:11,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:11,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 523 transitions, 7292 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:11,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:11,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:11,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:14,046 INFO L124 PetriNetUnfolderBase]: 4503/7387 cut-off events. [2024-06-21 17:16:14,046 INFO L125 PetriNetUnfolderBase]: For 737708/737713 co-relation queries the response was YES. [2024-06-21 17:16:14,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52854 conditions, 7387 events. 4503/7387 cut-off events. For 737708/737713 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 49173 event pairs, 975 based on Foata normal form. 4/7385 useless extension candidates. Maximal degree in co-relation 52704. Up to 5645 conditions per place. [2024-06-21 17:16:14,140 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 271 selfloop transitions, 273 changer transitions 0/549 dead transitions. [2024-06-21 17:16:14,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 549 transitions, 8646 flow [2024-06-21 17:16:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:16:14,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:16:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:16:14,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 17:16:14,144 INFO L175 Difference]: Start difference. First operand has 320 places, 523 transitions, 7292 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:16:14,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 549 transitions, 8646 flow [2024-06-21 17:16:16,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 549 transitions, 8074 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 17:16:16,330 INFO L231 Difference]: Finished difference. Result has 320 places, 523 transitions, 7276 flow [2024-06-21 17:16:16,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6720, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7276, PETRI_PLACES=320, PETRI_TRANSITIONS=523} [2024-06-21 17:16:16,330 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-21 17:16:16,330 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 523 transitions, 7276 flow [2024-06-21 17:16:16,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:16,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:16,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:16,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 17:16:16,331 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:16,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:16,331 INFO L85 PathProgramCache]: Analyzing trace with hash 183283026, now seen corresponding path program 3 times [2024-06-21 17:16:16,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:16,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995829255] [2024-06-21 17:16:16,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:16,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:19,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:19,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995829255] [2024-06-21 17:16:19,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995829255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:19,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:19,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:16:19,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512796035] [2024-06-21 17:16:19,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:19,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:16:19,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:19,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:16:19,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:16:19,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:19,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 523 transitions, 7276 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:19,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:19,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:19,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:21,650 INFO L124 PetriNetUnfolderBase]: 4488/7376 cut-off events. [2024-06-21 17:16:21,651 INFO L125 PetriNetUnfolderBase]: For 741918/741933 co-relation queries the response was YES. [2024-06-21 17:16:21,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51927 conditions, 7376 events. 4488/7376 cut-off events. For 741918/741933 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 49375 event pairs, 866 based on Foata normal form. 24/7396 useless extension candidates. Maximal degree in co-relation 51776. Up to 6058 conditions per place. [2024-06-21 17:16:21,745 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 487 selfloop transitions, 66 changer transitions 0/558 dead transitions. [2024-06-21 17:16:21,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 558 transitions, 8791 flow [2024-06-21 17:16:21,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:16:21,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:16:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:16:21,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 17:16:21,746 INFO L175 Difference]: Start difference. First operand has 320 places, 523 transitions, 7276 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:16:21,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 558 transitions, 8791 flow [2024-06-21 17:16:23,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 558 transitions, 8077 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 17:16:23,936 INFO L231 Difference]: Finished difference. Result has 319 places, 525 transitions, 6767 flow [2024-06-21 17:16:23,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6562, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6767, PETRI_PLACES=319, PETRI_TRANSITIONS=525} [2024-06-21 17:16:23,936 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-21 17:16:23,936 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 525 transitions, 6767 flow [2024-06-21 17:16:23,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:23,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:23,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:23,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 17:16:23,937 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:23,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:23,937 INFO L85 PathProgramCache]: Analyzing trace with hash -284133804, now seen corresponding path program 4 times [2024-06-21 17:16:23,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:23,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594723020] [2024-06-21 17:16:23,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:23,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:26,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:26,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594723020] [2024-06-21 17:16:26,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594723020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:26,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:26,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:16:26,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720734580] [2024-06-21 17:16:26,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:26,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:16:26,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:26,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:16:26,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:16:26,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:26,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 525 transitions, 6767 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:26,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:26,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:26,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:29,243 INFO L124 PetriNetUnfolderBase]: 4498/7357 cut-off events. [2024-06-21 17:16:29,243 INFO L125 PetriNetUnfolderBase]: For 701893/701901 co-relation queries the response was YES. [2024-06-21 17:16:29,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51431 conditions, 7357 events. 4498/7357 cut-off events. For 701893/701901 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 48935 event pairs, 967 based on Foata normal form. 8/7341 useless extension candidates. Maximal degree in co-relation 51279. Up to 6228 conditions per place. [2024-06-21 17:16:29,324 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 404 selfloop transitions, 150 changer transitions 0/559 dead transitions. [2024-06-21 17:16:29,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 559 transitions, 8049 flow [2024-06-21 17:16:29,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:16:29,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:16:29,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 17:16:29,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-21 17:16:29,326 INFO L175 Difference]: Start difference. First operand has 319 places, 525 transitions, 6767 flow. Second operand 9 states and 158 transitions. [2024-06-21 17:16:29,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 559 transitions, 8049 flow [2024-06-21 17:16:32,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 559 transitions, 7912 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 17:16:32,142 INFO L231 Difference]: Finished difference. Result has 323 places, 528 transitions, 7022 flow [2024-06-21 17:16:32,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6630, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7022, PETRI_PLACES=323, PETRI_TRANSITIONS=528} [2024-06-21 17:16:32,143 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-21 17:16:32,143 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 528 transitions, 7022 flow [2024-06-21 17:16:32,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:32,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:32,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:32,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 17:16:32,143 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:32,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:32,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1990955631, now seen corresponding path program 8 times [2024-06-21 17:16:32,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:32,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045419269] [2024-06-21 17:16:32,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:32,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:34,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:34,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045419269] [2024-06-21 17:16:34,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045419269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:34,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:34,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:16:34,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534242640] [2024-06-21 17:16:34,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:34,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:16:34,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:34,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:16:34,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:16:34,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:34,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 528 transitions, 7022 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:34,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:34,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:34,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:37,508 INFO L124 PetriNetUnfolderBase]: 4602/7554 cut-off events. [2024-06-21 17:16:37,508 INFO L125 PetriNetUnfolderBase]: For 788432/788440 co-relation queries the response was YES. [2024-06-21 17:16:37,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53797 conditions, 7554 events. 4602/7554 cut-off events. For 788432/788440 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 50636 event pairs, 939 based on Foata normal form. 14/7554 useless extension candidates. Maximal degree in co-relation 53644. Up to 6350 conditions per place. [2024-06-21 17:16:37,609 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 436 selfloop transitions, 155 changer transitions 0/596 dead transitions. [2024-06-21 17:16:37,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 596 transitions, 8906 flow [2024-06-21 17:16:37,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:16:37,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:16:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 207 transitions. [2024-06-21 17:16:37,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 17:16:37,610 INFO L175 Difference]: Start difference. First operand has 323 places, 528 transitions, 7022 flow. Second operand 12 states and 207 transitions. [2024-06-21 17:16:37,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 596 transitions, 8906 flow [2024-06-21 17:16:40,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 596 transitions, 8510 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-21 17:16:40,393 INFO L231 Difference]: Finished difference. Result has 329 places, 552 transitions, 7382 flow [2024-06-21 17:16:40,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6626, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7382, PETRI_PLACES=329, PETRI_TRANSITIONS=552} [2024-06-21 17:16:40,394 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-21 17:16:40,394 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 552 transitions, 7382 flow [2024-06-21 17:16:40,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:40,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:40,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:40,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 17:16:40,394 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:40,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:40,394 INFO L85 PathProgramCache]: Analyzing trace with hash -760951882, now seen corresponding path program 5 times [2024-06-21 17:16:40,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:40,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617352695] [2024-06-21 17:16:40,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:40,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:43,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:43,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:43,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617352695] [2024-06-21 17:16:43,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617352695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:43,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:43,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:16:43,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209689683] [2024-06-21 17:16:43,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:43,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:16:43,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:43,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:16:43,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:16:43,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:43,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 552 transitions, 7382 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:43,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:43,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:43,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:45,754 INFO L124 PetriNetUnfolderBase]: 4612/7533 cut-off events. [2024-06-21 17:16:45,754 INFO L125 PetriNetUnfolderBase]: For 775487/775495 co-relation queries the response was YES. [2024-06-21 17:16:45,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53969 conditions, 7533 events. 4612/7533 cut-off events. For 775487/775495 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 50210 event pairs, 985 based on Foata normal form. 8/7517 useless extension candidates. Maximal degree in co-relation 53815. Up to 6424 conditions per place. [2024-06-21 17:16:45,848 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 446 selfloop transitions, 134 changer transitions 0/585 dead transitions. [2024-06-21 17:16:45,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 585 transitions, 8706 flow [2024-06-21 17:16:45,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:16:45,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:16:45,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:16:45,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 17:16:45,849 INFO L175 Difference]: Start difference. First operand has 329 places, 552 transitions, 7382 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:16:45,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 585 transitions, 8706 flow [2024-06-21 17:16:48,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 585 transitions, 8384 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-21 17:16:48,759 INFO L231 Difference]: Finished difference. Result has 329 places, 555 transitions, 7415 flow [2024-06-21 17:16:48,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7060, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7415, PETRI_PLACES=329, PETRI_TRANSITIONS=555} [2024-06-21 17:16:48,759 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-21 17:16:48,759 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 555 transitions, 7415 flow [2024-06-21 17:16:48,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:48,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:48,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:48,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 17:16:48,759 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:48,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:48,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1070379665, now seen corresponding path program 9 times [2024-06-21 17:16:48,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:48,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154660391] [2024-06-21 17:16:48,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:48,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:51,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:51,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:51,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154660391] [2024-06-21 17:16:51,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154660391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:51,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:51,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:16:51,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092980066] [2024-06-21 17:16:51,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:51,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:16:51,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:51,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:16:51,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:16:51,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:51,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 555 transitions, 7415 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:51,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:51,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:51,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:54,174 INFO L124 PetriNetUnfolderBase]: 4588/7504 cut-off events. [2024-06-21 17:16:54,174 INFO L125 PetriNetUnfolderBase]: For 778399/778403 co-relation queries the response was YES. [2024-06-21 17:16:54,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53015 conditions, 7504 events. 4588/7504 cut-off events. For 778399/778403 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 50053 event pairs, 967 based on Foata normal form. 10/7492 useless extension candidates. Maximal degree in co-relation 52860. Up to 6276 conditions per place. [2024-06-21 17:16:54,273 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 417 selfloop transitions, 172 changer transitions 0/594 dead transitions. [2024-06-21 17:16:54,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 594 transitions, 8915 flow [2024-06-21 17:16:54,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:16:54,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:16:54,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2024-06-21 17:16:54,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-21 17:16:54,274 INFO L175 Difference]: Start difference. First operand has 329 places, 555 transitions, 7415 flow. Second operand 12 states and 206 transitions. [2024-06-21 17:16:54,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 594 transitions, 8915 flow [2024-06-21 17:16:57,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 594 transitions, 8576 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 17:16:57,152 INFO L231 Difference]: Finished difference. Result has 334 places, 555 transitions, 7438 flow [2024-06-21 17:16:57,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7076, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7438, PETRI_PLACES=334, PETRI_TRANSITIONS=555} [2024-06-21 17:16:57,152 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-21 17:16:57,152 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 555 transitions, 7438 flow [2024-06-21 17:16:57,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:57,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:57,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:57,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 17:16:57,153 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:57,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:57,153 INFO L85 PathProgramCache]: Analyzing trace with hash -760952099, now seen corresponding path program 10 times [2024-06-21 17:16:57,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:57,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314218671] [2024-06-21 17:16:57,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:57,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:59,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:59,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314218671] [2024-06-21 17:16:59,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314218671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:59,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:59,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:16:59,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372099722] [2024-06-21 17:16:59,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:59,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:16:59,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:59,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:16:59,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:16:59,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:16:59,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 555 transitions, 7438 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:59,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:59,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:16:59,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:02,372 INFO L124 PetriNetUnfolderBase]: 4564/7508 cut-off events. [2024-06-21 17:17:02,372 INFO L125 PetriNetUnfolderBase]: For 744266/744274 co-relation queries the response was YES. [2024-06-21 17:17:02,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52206 conditions, 7508 events. 4564/7508 cut-off events. For 744266/744274 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 50520 event pairs, 937 based on Foata normal form. 14/7508 useless extension candidates. Maximal degree in co-relation 52050. Up to 6312 conditions per place. [2024-06-21 17:17:02,472 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 436 selfloop transitions, 155 changer transitions 0/596 dead transitions. [2024-06-21 17:17:02,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 596 transitions, 8746 flow [2024-06-21 17:17:02,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:17:02,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:17:02,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-21 17:17:02,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41774891774891776 [2024-06-21 17:17:02,473 INFO L175 Difference]: Start difference. First operand has 334 places, 555 transitions, 7438 flow. Second operand 11 states and 193 transitions. [2024-06-21 17:17:02,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 596 transitions, 8746 flow [2024-06-21 17:17:05,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 596 transitions, 7901 flow, removed 46 selfloop flow, removed 14 redundant places. [2024-06-21 17:17:05,094 INFO L231 Difference]: Finished difference. Result has 331 places, 555 transitions, 6919 flow [2024-06-21 17:17:05,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6593, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6919, PETRI_PLACES=331, PETRI_TRANSITIONS=555} [2024-06-21 17:17:05,094 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-21 17:17:05,094 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 555 transitions, 6919 flow [2024-06-21 17:17:05,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:05,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:05,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:05,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 17:17:05,095 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:05,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:05,095 INFO L85 PathProgramCache]: Analyzing trace with hash -14605696, now seen corresponding path program 6 times [2024-06-21 17:17:05,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:05,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558751497] [2024-06-21 17:17:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:05,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:08,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:08,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558751497] [2024-06-21 17:17:08,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558751497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:08,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:08,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:17:08,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403137219] [2024-06-21 17:17:08,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:08,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:17:08,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:08,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:17:08,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:17:08,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:17:08,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 555 transitions, 6919 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:08,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:08,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:17:08,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:10,649 INFO L124 PetriNetUnfolderBase]: 4574/7472 cut-off events. [2024-06-21 17:17:10,649 INFO L125 PetriNetUnfolderBase]: For 719755/719759 co-relation queries the response was YES. [2024-06-21 17:17:10,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51814 conditions, 7472 events. 4574/7472 cut-off events. For 719755/719759 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 49759 event pairs, 978 based on Foata normal form. 4/7450 useless extension candidates. Maximal degree in co-relation 51658. Up to 6295 conditions per place. [2024-06-21 17:17:10,743 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 437 selfloop transitions, 153 changer transitions 0/595 dead transitions. [2024-06-21 17:17:10,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 595 transitions, 8569 flow [2024-06-21 17:17:10,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:17:10,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:17:10,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-21 17:17:10,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-21 17:17:10,745 INFO L175 Difference]: Start difference. First operand has 331 places, 555 transitions, 6919 flow. Second operand 11 states and 188 transitions. [2024-06-21 17:17:10,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 595 transitions, 8569 flow [2024-06-21 17:17:13,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 595 transitions, 8215 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 17:17:13,320 INFO L231 Difference]: Finished difference. Result has 331 places, 561 transitions, 7044 flow [2024-06-21 17:17:13,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6565, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7044, PETRI_PLACES=331, PETRI_TRANSITIONS=561} [2024-06-21 17:17:13,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-21 17:17:13,320 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 561 transitions, 7044 flow [2024-06-21 17:17:13,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:13,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:13,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:13,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 17:17:13,321 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:13,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:13,321 INFO L85 PathProgramCache]: Analyzing trace with hash 764046843, now seen corresponding path program 11 times [2024-06-21 17:17:13,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:13,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450106946] [2024-06-21 17:17:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:13,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:15,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:15,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450106946] [2024-06-21 17:17:15,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450106946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:15,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:15,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:17:15,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901121974] [2024-06-21 17:17:15,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:15,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:17:15,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:15,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:17:15,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:17:16,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:17:16,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 561 transitions, 7044 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:16,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:16,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:17:16,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:18,867 INFO L124 PetriNetUnfolderBase]: 4582/7508 cut-off events. [2024-06-21 17:17:18,867 INFO L125 PetriNetUnfolderBase]: For 744346/744350 co-relation queries the response was YES. [2024-06-21 17:17:18,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51352 conditions, 7508 events. 4582/7508 cut-off events. For 744346/744350 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 50248 event pairs, 963 based on Foata normal form. 10/7496 useless extension candidates. Maximal degree in co-relation 51196. Up to 6268 conditions per place. [2024-06-21 17:17:18,969 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 427 selfloop transitions, 178 changer transitions 0/610 dead transitions. [2024-06-21 17:17:18,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 610 transitions, 8668 flow [2024-06-21 17:17:18,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 17:17:18,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 17:17:18,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 232 transitions. [2024-06-21 17:17:18,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 17:17:18,971 INFO L175 Difference]: Start difference. First operand has 331 places, 561 transitions, 7044 flow. Second operand 14 states and 232 transitions. [2024-06-21 17:17:18,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 610 transitions, 8668 flow [2024-06-21 17:17:21,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 610 transitions, 8406 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-21 17:17:21,347 INFO L231 Difference]: Finished difference. Result has 338 places, 567 transitions, 7232 flow [2024-06-21 17:17:21,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6782, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7232, PETRI_PLACES=338, PETRI_TRANSITIONS=567} [2024-06-21 17:17:21,348 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-21 17:17:21,348 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 567 transitions, 7232 flow [2024-06-21 17:17:21,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:21,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:21,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:21,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 17:17:21,348 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:21,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:21,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1136445853, now seen corresponding path program 12 times [2024-06-21 17:17:21,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:21,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745615491] [2024-06-21 17:17:21,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:21,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:24,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:24,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745615491] [2024-06-21 17:17:24,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745615491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:24,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:24,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:17:24,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849303538] [2024-06-21 17:17:24,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:24,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:17:24,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:24,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:17:24,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:17:24,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:17:24,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 567 transitions, 7232 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:24,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:24,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:17:24,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:26,351 INFO L124 PetriNetUnfolderBase]: 4570/7475 cut-off events. [2024-06-21 17:17:26,351 INFO L125 PetriNetUnfolderBase]: For 707977/707979 co-relation queries the response was YES. [2024-06-21 17:17:26,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51380 conditions, 7475 events. 4570/7475 cut-off events. For 707977/707979 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 49887 event pairs, 985 based on Foata normal form. 4/7455 useless extension candidates. Maximal degree in co-relation 51222. Up to 6314 conditions per place. [2024-06-21 17:17:26,449 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 435 selfloop transitions, 153 changer transitions 0/593 dead transitions. [2024-06-21 17:17:26,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 593 transitions, 8482 flow [2024-06-21 17:17:26,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:17:26,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:17:26,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 17:17:26,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 17:17:26,451 INFO L175 Difference]: Start difference. First operand has 338 places, 567 transitions, 7232 flow. Second operand 9 states and 155 transitions. [2024-06-21 17:17:26,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 593 transitions, 8482 flow [2024-06-21 17:17:29,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 593 transitions, 8110 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-21 17:17:29,320 INFO L231 Difference]: Finished difference. Result has 335 places, 567 transitions, 7175 flow [2024-06-21 17:17:29,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6860, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7175, PETRI_PLACES=335, PETRI_TRANSITIONS=567} [2024-06-21 17:17:29,321 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-21 17:17:29,321 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 567 transitions, 7175 flow [2024-06-21 17:17:29,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:29,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:29,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:29,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 17:17:29,321 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:29,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:29,322 INFO L85 PathProgramCache]: Analyzing trace with hash -718970254, now seen corresponding path program 7 times [2024-06-21 17:17:29,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:29,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984744856] [2024-06-21 17:17:29,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:29,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:32,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:32,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:32,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984744856] [2024-06-21 17:17:32,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984744856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:32,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:32,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:17:32,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189933917] [2024-06-21 17:17:32,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:32,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:17:32,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:32,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:17:32,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:17:32,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:17:32,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 567 transitions, 7175 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:32,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:32,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:17:32,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:34,703 INFO L124 PetriNetUnfolderBase]: 4564/7463 cut-off events. [2024-06-21 17:17:34,703 INFO L125 PetriNetUnfolderBase]: For 695506/695508 co-relation queries the response was YES. [2024-06-21 17:17:34,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51097 conditions, 7463 events. 4564/7463 cut-off events. For 695506/695508 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 49794 event pairs, 985 based on Foata normal form. 2/7439 useless extension candidates. Maximal degree in co-relation 50938. Up to 6286 conditions per place. [2024-06-21 17:17:34,796 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 436 selfloop transitions, 152 changer transitions 0/593 dead transitions. [2024-06-21 17:17:34,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 593 transitions, 8425 flow [2024-06-21 17:17:34,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:17:34,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:17:34,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 17:17:34,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 17:17:34,797 INFO L175 Difference]: Start difference. First operand has 335 places, 567 transitions, 7175 flow. Second operand 9 states and 155 transitions. [2024-06-21 17:17:34,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 593 transitions, 8425 flow [2024-06-21 17:17:38,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 593 transitions, 8071 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 17:17:38,179 INFO L231 Difference]: Finished difference. Result has 336 places, 567 transitions, 7132 flow [2024-06-21 17:17:38,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6821, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7132, PETRI_PLACES=336, PETRI_TRANSITIONS=567} [2024-06-21 17:17:38,180 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-21 17:17:38,180 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 567 transitions, 7132 flow [2024-06-21 17:17:38,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:38,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:38,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:38,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 17:17:38,180 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:38,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:38,180 INFO L85 PathProgramCache]: Analyzing trace with hash -377166922, now seen corresponding path program 8 times [2024-06-21 17:17:38,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:38,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189246729] [2024-06-21 17:17:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:38,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:41,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:41,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189246729] [2024-06-21 17:17:41,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189246729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:41,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:41,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:17:41,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238275176] [2024-06-21 17:17:41,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:41,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:17:41,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:41,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:17:41,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:17:41,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:17:41,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 567 transitions, 7132 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:41,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:41,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:17:41,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:43,622 INFO L124 PetriNetUnfolderBase]: 4606/7483 cut-off events. [2024-06-21 17:17:43,623 INFO L125 PetriNetUnfolderBase]: For 734628/734636 co-relation queries the response was YES. [2024-06-21 17:17:43,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52094 conditions, 7483 events. 4606/7483 cut-off events. For 734628/734636 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 49675 event pairs, 928 based on Foata normal form. 8/7463 useless extension candidates. Maximal degree in co-relation 51934. Up to 5192 conditions per place. [2024-06-21 17:17:43,886 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 247 selfloop transitions, 361 changer transitions 0/613 dead transitions. [2024-06-21 17:17:43,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 613 transitions, 9430 flow [2024-06-21 17:17:43,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:17:43,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:17:43,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 17:17:43,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 17:17:43,887 INFO L175 Difference]: Start difference. First operand has 336 places, 567 transitions, 7132 flow. Second operand 9 states and 165 transitions. [2024-06-21 17:17:43,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 613 transitions, 9430 flow [2024-06-21 17:17:46,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 613 transitions, 9001 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 17:17:46,889 INFO L231 Difference]: Finished difference. Result has 336 places, 580 transitions, 7765 flow [2024-06-21 17:17:46,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6703, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7765, PETRI_PLACES=336, PETRI_TRANSITIONS=580} [2024-06-21 17:17:46,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-21 17:17:46,889 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 580 transitions, 7765 flow [2024-06-21 17:17:46,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:46,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:46,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:46,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 17:17:46,890 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:46,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:46,891 INFO L85 PathProgramCache]: Analyzing trace with hash -578638339, now seen corresponding path program 13 times [2024-06-21 17:17:46,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:46,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244956600] [2024-06-21 17:17:46,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:46,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:49,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:49,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244956600] [2024-06-21 17:17:49,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244956600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:49,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:49,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:17:49,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128117405] [2024-06-21 17:17:49,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:49,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:17:49,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:49,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:17:49,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:17:49,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:17:49,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 580 transitions, 7765 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:49,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:49,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:17:49,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:52,357 INFO L124 PetriNetUnfolderBase]: 4632/7621 cut-off events. [2024-06-21 17:17:52,357 INFO L125 PetriNetUnfolderBase]: For 764037/764045 co-relation queries the response was YES. [2024-06-21 17:17:52,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53677 conditions, 7621 events. 4632/7621 cut-off events. For 764037/764045 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 51450 event pairs, 833 based on Foata normal form. 8/7615 useless extension candidates. Maximal degree in co-relation 53517. Up to 6025 conditions per place. [2024-06-21 17:17:52,462 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 356 selfloop transitions, 267 changer transitions 0/628 dead transitions. [2024-06-21 17:17:52,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 628 transitions, 9653 flow [2024-06-21 17:17:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:17:52,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:17:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-21 17:17:52,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134199134199134 [2024-06-21 17:17:52,463 INFO L175 Difference]: Start difference. First operand has 336 places, 580 transitions, 7765 flow. Second operand 11 states and 191 transitions. [2024-06-21 17:17:52,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 628 transitions, 9653 flow [2024-06-21 17:17:55,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 628 transitions, 9382 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-21 17:17:55,638 INFO L231 Difference]: Finished difference. Result has 344 places, 586 transitions, 8108 flow [2024-06-21 17:17:55,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7494, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8108, PETRI_PLACES=344, PETRI_TRANSITIONS=586} [2024-06-21 17:17:55,638 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-21 17:17:55,638 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 586 transitions, 8108 flow [2024-06-21 17:17:55,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:55,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:55,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:55,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 17:17:55,639 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:55,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:55,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1982693194, now seen corresponding path program 4 times [2024-06-21 17:17:55,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:55,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778657672] [2024-06-21 17:17:55,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:55,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:58,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:58,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778657672] [2024-06-21 17:17:58,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778657672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:58,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:58,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:17:58,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158905864] [2024-06-21 17:17:58,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:58,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:17:58,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:58,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:17:58,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:17:58,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:17:58,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 586 transitions, 8108 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:58,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:58,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:17:58,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:01,006 INFO L124 PetriNetUnfolderBase]: 4620/7611 cut-off events. [2024-06-21 17:18:01,006 INFO L125 PetriNetUnfolderBase]: For 759907/759913 co-relation queries the response was YES. [2024-06-21 17:18:01,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53708 conditions, 7611 events. 4620/7611 cut-off events. For 759907/759913 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 51460 event pairs, 989 based on Foata normal form. 6/7603 useless extension candidates. Maximal degree in co-relation 53545. Up to 6894 conditions per place. [2024-06-21 17:18:01,107 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 568 selfloop transitions, 38 changer transitions 0/611 dead transitions. [2024-06-21 17:18:01,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 611 transitions, 9396 flow [2024-06-21 17:18:01,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:18:01,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:18:01,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 17:18:01,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 17:18:01,108 INFO L175 Difference]: Start difference. First operand has 344 places, 586 transitions, 8108 flow. Second operand 8 states and 133 transitions. [2024-06-21 17:18:01,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 611 transitions, 9396 flow [2024-06-21 17:18:04,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 611 transitions, 8805 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-21 17:18:04,793 INFO L231 Difference]: Finished difference. Result has 344 places, 586 transitions, 7599 flow [2024-06-21 17:18:04,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7517, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7599, PETRI_PLACES=344, PETRI_TRANSITIONS=586} [2024-06-21 17:18:04,794 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-21 17:18:04,794 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 586 transitions, 7599 flow [2024-06-21 17:18:04,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:04,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:04,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:04,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 17:18:04,794 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:04,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:04,795 INFO L85 PathProgramCache]: Analyzing trace with hash -376900012, now seen corresponding path program 9 times [2024-06-21 17:18:04,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:04,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92385597] [2024-06-21 17:18:04,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:04,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:07,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:07,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92385597] [2024-06-21 17:18:07,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92385597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:07,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:07,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:18:07,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912826699] [2024-06-21 17:18:07,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:07,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:18:07,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:07,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:18:07,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:18:07,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:18:07,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 586 transitions, 7599 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:07,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:07,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:18:07,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:10,315 INFO L124 PetriNetUnfolderBase]: 4614/7492 cut-off events. [2024-06-21 17:18:10,315 INFO L125 PetriNetUnfolderBase]: For 756942/756950 co-relation queries the response was YES. [2024-06-21 17:18:10,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52230 conditions, 7492 events. 4614/7492 cut-off events. For 756942/756950 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 49756 event pairs, 925 based on Foata normal form. 8/7472 useless extension candidates. Maximal degree in co-relation 52067. Up to 5184 conditions per place. [2024-06-21 17:18:10,407 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 242 selfloop transitions, 371 changer transitions 0/618 dead transitions. [2024-06-21 17:18:10,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 618 transitions, 9369 flow [2024-06-21 17:18:10,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:18:10,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:18:10,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 17:18:10,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 17:18:10,408 INFO L175 Difference]: Start difference. First operand has 344 places, 586 transitions, 7599 flow. Second operand 9 states and 165 transitions. [2024-06-21 17:18:10,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 618 transitions, 9369 flow [2024-06-21 17:18:13,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 618 transitions, 9166 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-21 17:18:13,492 INFO L231 Difference]: Finished difference. Result has 345 places, 586 transitions, 8144 flow [2024-06-21 17:18:13,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7396, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8144, PETRI_PLACES=345, PETRI_TRANSITIONS=586} [2024-06-21 17:18:13,492 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-21 17:18:13,492 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 586 transitions, 8144 flow [2024-06-21 17:18:13,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:13,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:13,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:13,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 17:18:13,492 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:13,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:13,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1535950324, now seen corresponding path program 5 times [2024-06-21 17:18:13,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:13,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356619536] [2024-06-21 17:18:13,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:13,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:16,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:16,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356619536] [2024-06-21 17:18:16,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356619536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:16,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:16,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:18:16,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65938204] [2024-06-21 17:18:16,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:16,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:18:16,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:16,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:18:16,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:18:16,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:18:16,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 586 transitions, 8144 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:16,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:16,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:18:16,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:19,085 INFO L124 PetriNetUnfolderBase]: 4622/7594 cut-off events. [2024-06-21 17:18:19,085 INFO L125 PetriNetUnfolderBase]: For 771776/771784 co-relation queries the response was YES. [2024-06-21 17:18:19,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53667 conditions, 7594 events. 4622/7594 cut-off events. For 771776/771784 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 51132 event pairs, 836 based on Foata normal form. 8/7588 useless extension candidates. Maximal degree in co-relation 53503. Up to 6652 conditions per place. [2024-06-21 17:18:19,173 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 516 selfloop transitions, 91 changer transitions 0/612 dead transitions. [2024-06-21 17:18:19,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 612 transitions, 9483 flow [2024-06-21 17:18:19,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:18:19,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:18:19,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 17:18:19,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 17:18:19,174 INFO L175 Difference]: Start difference. First operand has 345 places, 586 transitions, 8144 flow. Second operand 8 states and 136 transitions. [2024-06-21 17:18:19,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 612 transitions, 9483 flow [2024-06-21 17:18:22,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 612 transitions, 8829 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 17:18:22,833 INFO L231 Difference]: Finished difference. Result has 346 places, 588 transitions, 7738 flow [2024-06-21 17:18:22,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7490, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7738, PETRI_PLACES=346, PETRI_TRANSITIONS=588} [2024-06-21 17:18:22,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-21 17:18:22,834 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 588 transitions, 7738 flow [2024-06-21 17:18:22,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:22,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:22,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:22,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 17:18:22,834 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:22,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:22,834 INFO L85 PathProgramCache]: Analyzing trace with hash 33100839, now seen corresponding path program 14 times [2024-06-21 17:18:22,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:22,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820522421] [2024-06-21 17:18:22,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:22,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:25,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:25,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820522421] [2024-06-21 17:18:25,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820522421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:25,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:25,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:18:25,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850953525] [2024-06-21 17:18:25,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:25,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:18:25,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:25,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:18:25,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:18:25,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:18:25,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 588 transitions, 7738 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:25,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:25,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:18:25,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:27,682 INFO L124 PetriNetUnfolderBase]: 4616/7613 cut-off events. [2024-06-21 17:18:27,683 INFO L125 PetriNetUnfolderBase]: For 768236/768269 co-relation queries the response was YES. [2024-06-21 17:18:27,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52514 conditions, 7613 events. 4616/7613 cut-off events. For 768236/768269 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 51434 event pairs, 927 based on Foata normal form. 4/7596 useless extension candidates. Maximal degree in co-relation 52349. Up to 6004 conditions per place. [2024-06-21 17:18:27,786 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 363 selfloop transitions, 239 changer transitions 0/607 dead transitions. [2024-06-21 17:18:27,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 607 transitions, 9224 flow [2024-06-21 17:18:27,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:18:27,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:18:27,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:18:27,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 17:18:27,787 INFO L175 Difference]: Start difference. First operand has 346 places, 588 transitions, 7738 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:18:27,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 607 transitions, 9224 flow [2024-06-21 17:18:31,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 607 transitions, 8995 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 17:18:31,502 INFO L231 Difference]: Finished difference. Result has 348 places, 588 transitions, 7993 flow [2024-06-21 17:18:31,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7509, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7993, PETRI_PLACES=348, PETRI_TRANSITIONS=588} [2024-06-21 17:18:31,503 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-21 17:18:31,503 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 588 transitions, 7993 flow [2024-06-21 17:18:31,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:31,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:31,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:31,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 17:18:31,503 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:31,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:31,503 INFO L85 PathProgramCache]: Analyzing trace with hash 3469684, now seen corresponding path program 6 times [2024-06-21 17:18:31,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:31,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631622594] [2024-06-21 17:18:31,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:31,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:34,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:34,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631622594] [2024-06-21 17:18:34,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631622594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:34,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:34,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:18:34,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783847972] [2024-06-21 17:18:34,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:34,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:18:34,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:34,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:18:34,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:18:34,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:18:34,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 588 transitions, 7993 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:34,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:34,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:18:34,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:36,832 INFO L124 PetriNetUnfolderBase]: 4624/7606 cut-off events. [2024-06-21 17:18:36,832 INFO L125 PetriNetUnfolderBase]: For 782517/782525 co-relation queries the response was YES. [2024-06-21 17:18:36,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53135 conditions, 7606 events. 4624/7606 cut-off events. For 782517/782525 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 51343 event pairs, 838 based on Foata normal form. 8/7600 useless extension candidates. Maximal degree in co-relation 52969. Up to 6570 conditions per place. [2024-06-21 17:18:36,940 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 515 selfloop transitions, 98 changer transitions 0/618 dead transitions. [2024-06-21 17:18:36,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 618 transitions, 9382 flow [2024-06-21 17:18:36,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:18:36,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:18:36,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:18:36,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:18:36,941 INFO L175 Difference]: Start difference. First operand has 348 places, 588 transitions, 7993 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:18:36,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 618 transitions, 9382 flow [2024-06-21 17:18:40,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 618 transitions, 8886 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:18:40,386 INFO L231 Difference]: Finished difference. Result has 350 places, 590 transitions, 7757 flow [2024-06-21 17:18:40,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7497, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7757, PETRI_PLACES=350, PETRI_TRANSITIONS=590} [2024-06-21 17:18:40,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-21 17:18:40,387 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 590 transitions, 7757 flow [2024-06-21 17:18:40,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:40,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:40,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:40,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 17:18:40,387 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:40,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:40,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1543295030, now seen corresponding path program 10 times [2024-06-21 17:18:40,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:40,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687036065] [2024-06-21 17:18:40,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:40,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:43,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:43,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687036065] [2024-06-21 17:18:43,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687036065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:43,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:43,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:18:43,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769176916] [2024-06-21 17:18:43,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:43,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:18:43,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:43,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:18:43,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:18:43,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:18:43,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 590 transitions, 7757 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:43,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:43,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:18:43,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:45,975 INFO L124 PetriNetUnfolderBase]: 4666/7576 cut-off events. [2024-06-21 17:18:45,975 INFO L125 PetriNetUnfolderBase]: For 826304/826306 co-relation queries the response was YES. [2024-06-21 17:18:46,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53863 conditions, 7576 events. 4666/7576 cut-off events. For 826304/826306 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 50394 event pairs, 958 based on Foata normal form. 2/7550 useless extension candidates. Maximal degree in co-relation 53696. Up to 5229 conditions per place. [2024-06-21 17:18:46,070 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 253 selfloop transitions, 370 changer transitions 0/628 dead transitions. [2024-06-21 17:18:46,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 628 transitions, 10276 flow [2024-06-21 17:18:46,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:18:46,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:18:46,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 17:18:46,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 17:18:46,071 INFO L175 Difference]: Start difference. First operand has 350 places, 590 transitions, 7757 flow. Second operand 9 states and 164 transitions. [2024-06-21 17:18:46,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 628 transitions, 10276 flow [2024-06-21 17:18:49,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 628 transitions, 10039 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 17:18:49,672 INFO L231 Difference]: Finished difference. Result has 353 places, 599 transitions, 8521 flow [2024-06-21 17:18:49,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7520, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=361, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8521, PETRI_PLACES=353, PETRI_TRANSITIONS=599} [2024-06-21 17:18:49,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-21 17:18:49,673 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 599 transitions, 8521 flow [2024-06-21 17:18:49,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:49,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:49,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:49,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 17:18:49,673 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:49,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:49,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1633662959, now seen corresponding path program 15 times [2024-06-21 17:18:49,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:49,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859080225] [2024-06-21 17:18:49,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:49,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:52,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:52,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859080225] [2024-06-21 17:18:52,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859080225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:52,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:52,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:18:52,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954176438] [2024-06-21 17:18:52,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:52,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:18:52,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:52,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:18:52,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:18:52,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:18:52,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 599 transitions, 8521 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:52,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:52,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:18:52,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:55,046 INFO L124 PetriNetUnfolderBase]: 4692/7681 cut-off events. [2024-06-21 17:18:55,046 INFO L125 PetriNetUnfolderBase]: For 856964/856966 co-relation queries the response was YES. [2024-06-21 17:18:55,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55433 conditions, 7681 events. 4692/7681 cut-off events. For 856964/856966 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 51619 event pairs, 886 based on Foata normal form. 2/7663 useless extension candidates. Maximal degree in co-relation 55265. Up to 6099 conditions per place. [2024-06-21 17:18:55,153 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 366 selfloop transitions, 264 changer transitions 0/635 dead transitions. [2024-06-21 17:18:55,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 635 transitions, 10411 flow [2024-06-21 17:18:55,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:18:55,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:18:55,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 17:18:55,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 17:18:55,155 INFO L175 Difference]: Start difference. First operand has 353 places, 599 transitions, 8521 flow. Second operand 10 states and 170 transitions. [2024-06-21 17:18:55,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 635 transitions, 10411 flow [2024-06-21 17:18:58,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 635 transitions, 9725 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 17:18:58,899 INFO L231 Difference]: Finished difference. Result has 359 places, 605 transitions, 8443 flow [2024-06-21 17:18:58,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7843, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8443, PETRI_PLACES=359, PETRI_TRANSITIONS=605} [2024-06-21 17:18:58,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-21 17:18:58,899 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 605 transitions, 8443 flow [2024-06-21 17:18:58,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:58,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:58,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:58,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 17:18:58,900 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:58,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:58,900 INFO L85 PathProgramCache]: Analyzing trace with hash -989913634, now seen corresponding path program 11 times [2024-06-21 17:18:58,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:58,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338122417] [2024-06-21 17:18:58,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:58,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:01,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:01,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:01,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338122417] [2024-06-21 17:19:01,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338122417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:01,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:01,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:01,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555277165] [2024-06-21 17:19:01,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:01,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:01,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:01,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:01,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:01,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:19:01,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 605 transitions, 8443 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:01,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:01,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:19:01,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:04,321 INFO L124 PetriNetUnfolderBase]: 4686/7630 cut-off events. [2024-06-21 17:19:04,321 INFO L125 PetriNetUnfolderBase]: For 856152/856154 co-relation queries the response was YES. [2024-06-21 17:19:04,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54751 conditions, 7630 events. 4686/7630 cut-off events. For 856152/856154 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 50885 event pairs, 979 based on Foata normal form. 2/7608 useless extension candidates. Maximal degree in co-relation 54582. Up to 5241 conditions per place. [2024-06-21 17:19:04,426 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 248 selfloop transitions, 380 changer transitions 0/633 dead transitions. [2024-06-21 17:19:04,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 633 transitions, 10491 flow [2024-06-21 17:19:04,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:19:04,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:19:04,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:19:04,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 17:19:04,428 INFO L175 Difference]: Start difference. First operand has 359 places, 605 transitions, 8443 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:19:04,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 633 transitions, 10491 flow [2024-06-21 17:19:08,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 633 transitions, 10067 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 17:19:08,036 INFO L231 Difference]: Finished difference. Result has 362 places, 605 transitions, 8785 flow [2024-06-21 17:19:08,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8019, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8785, PETRI_PLACES=362, PETRI_TRANSITIONS=605} [2024-06-21 17:19:08,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-21 17:19:08,037 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 605 transitions, 8785 flow [2024-06-21 17:19:08,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:08,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:08,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:08,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 17:19:08,037 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:08,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:08,037 INFO L85 PathProgramCache]: Analyzing trace with hash 998335697, now seen corresponding path program 16 times [2024-06-21 17:19:08,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:08,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917342508] [2024-06-21 17:19:08,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:08,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:10,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:10,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917342508] [2024-06-21 17:19:10,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917342508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:10,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:10,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:10,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296205538] [2024-06-21 17:19:10,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:10,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:10,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:10,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:10,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:10,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:19:10,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 605 transitions, 8785 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:10,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:10,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:19:10,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:13,483 INFO L124 PetriNetUnfolderBase]: 4680/7660 cut-off events. [2024-06-21 17:19:13,483 INFO L125 PetriNetUnfolderBase]: For 859126/859128 co-relation queries the response was YES. [2024-06-21 17:19:13,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55151 conditions, 7660 events. 4680/7660 cut-off events. For 859126/859128 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 51463 event pairs, 915 based on Foata normal form. 2/7642 useless extension candidates. Maximal degree in co-relation 54980. Up to 6086 conditions per place. [2024-06-21 17:19:13,585 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 365 selfloop transitions, 262 changer transitions 0/632 dead transitions. [2024-06-21 17:19:13,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 632 transitions, 10355 flow [2024-06-21 17:19:13,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:19:13,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:19:13,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 17:19:13,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 17:19:13,587 INFO L175 Difference]: Start difference. First operand has 362 places, 605 transitions, 8785 flow. Second operand 9 states and 155 transitions. [2024-06-21 17:19:13,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 632 transitions, 10355 flow [2024-06-21 17:19:17,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 632 transitions, 9698 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 17:19:17,094 INFO L231 Difference]: Finished difference. Result has 365 places, 605 transitions, 8658 flow [2024-06-21 17:19:17,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8128, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8658, PETRI_PLACES=365, PETRI_TRANSITIONS=605} [2024-06-21 17:19:17,095 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-21 17:19:17,095 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 605 transitions, 8658 flow [2024-06-21 17:19:17,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:17,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:17,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:17,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 17:19:17,095 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:17,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:17,096 INFO L85 PathProgramCache]: Analyzing trace with hash -218879438, now seen corresponding path program 12 times [2024-06-21 17:19:17,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:17,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509504646] [2024-06-21 17:19:17,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:17,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:20,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:20,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509504646] [2024-06-21 17:19:20,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509504646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:20,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:20,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:20,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906182953] [2024-06-21 17:19:20,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:20,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:20,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:20,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:20,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:20,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:19:20,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 605 transitions, 8658 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:20,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:20,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:19:20,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:22,937 INFO L124 PetriNetUnfolderBase]: 4674/7615 cut-off events. [2024-06-21 17:19:22,937 INFO L125 PetriNetUnfolderBase]: For 858533/858535 co-relation queries the response was YES. [2024-06-21 17:19:23,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54514 conditions, 7615 events. 4674/7615 cut-off events. For 858533/858535 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 50802 event pairs, 994 based on Foata normal form. 2/7593 useless extension candidates. Maximal degree in co-relation 54342. Up to 5235 conditions per place. [2024-06-21 17:19:23,041 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 253 selfloop transitions, 374 changer transitions 0/632 dead transitions. [2024-06-21 17:19:23,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 632 transitions, 10470 flow [2024-06-21 17:19:23,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:19:23,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:19:23,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 17:19:23,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 17:19:23,043 INFO L175 Difference]: Start difference. First operand has 365 places, 605 transitions, 8658 flow. Second operand 9 states and 160 transitions. [2024-06-21 17:19:23,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 632 transitions, 10470 flow [2024-06-21 17:19:26,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 632 transitions, 9883 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 17:19:26,289 INFO L231 Difference]: Finished difference. Result has 366 places, 605 transitions, 8825 flow [2024-06-21 17:19:26,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8071, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=374, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8825, PETRI_PLACES=366, PETRI_TRANSITIONS=605} [2024-06-21 17:19:26,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-21 17:19:26,290 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 605 transitions, 8825 flow [2024-06-21 17:19:26,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:26,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:26,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:26,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 17:19:26,290 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:26,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:26,290 INFO L85 PathProgramCache]: Analyzing trace with hash 382586724, now seen corresponding path program 7 times [2024-06-21 17:19:26,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:26,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347501867] [2024-06-21 17:19:26,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:26,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:29,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:29,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347501867] [2024-06-21 17:19:29,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347501867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:29,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:29,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:29,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278148638] [2024-06-21 17:19:29,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:29,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:29,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:29,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:29,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:29,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:19:29,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 605 transitions, 8825 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:29,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:29,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:19:29,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:31,797 INFO L124 PetriNetUnfolderBase]: 4682/7727 cut-off events. [2024-06-21 17:19:31,797 INFO L125 PetriNetUnfolderBase]: For 870528/870561 co-relation queries the response was YES. [2024-06-21 17:19:31,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55167 conditions, 7727 events. 4682/7727 cut-off events. For 870528/870561 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 52373 event pairs, 855 based on Foata normal form. 18/7726 useless extension candidates. Maximal degree in co-relation 54994. Up to 6738 conditions per place. [2024-06-21 17:19:31,896 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 536 selfloop transitions, 84 changer transitions 0/625 dead transitions. [2024-06-21 17:19:31,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 625 transitions, 10174 flow [2024-06-21 17:19:31,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:19:31,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:19:31,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 17:19:31,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 17:19:31,898 INFO L175 Difference]: Start difference. First operand has 366 places, 605 transitions, 8825 flow. Second operand 8 states and 130 transitions. [2024-06-21 17:19:31,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 625 transitions, 10174 flow [2024-06-21 17:19:36,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 625 transitions, 9361 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 17:19:36,089 INFO L231 Difference]: Finished difference. Result has 365 places, 607 transitions, 8250 flow [2024-06-21 17:19:36,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8012, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8250, PETRI_PLACES=365, PETRI_TRANSITIONS=607} [2024-06-21 17:19:36,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-21 17:19:36,089 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 607 transitions, 8250 flow [2024-06-21 17:19:36,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:36,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:36,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:36,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 17:19:36,090 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:36,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:36,090 INFO L85 PathProgramCache]: Analyzing trace with hash 317787764, now seen corresponding path program 8 times [2024-06-21 17:19:36,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:36,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253181768] [2024-06-21 17:19:36,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:36,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:39,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:39,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253181768] [2024-06-21 17:19:39,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253181768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:39,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:39,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:39,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861268844] [2024-06-21 17:19:39,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:39,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:39,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:39,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:39,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:39,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:19:39,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 607 transitions, 8250 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:39,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:39,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:19:39,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:41,906 INFO L124 PetriNetUnfolderBase]: 4726/7795 cut-off events. [2024-06-21 17:19:41,906 INFO L125 PetriNetUnfolderBase]: For 952955/952988 co-relation queries the response was YES. [2024-06-21 17:19:41,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54639 conditions, 7795 events. 4726/7795 cut-off events. For 952955/952988 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 52881 event pairs, 877 based on Foata normal form. 28/7804 useless extension candidates. Maximal degree in co-relation 54465. Up to 6764 conditions per place. [2024-06-21 17:19:42,002 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 550 selfloop transitions, 76 changer transitions 0/631 dead transitions. [2024-06-21 17:19:42,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 631 transitions, 9655 flow [2024-06-21 17:19:42,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:19:42,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:19:42,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:19:42,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 17:19:42,003 INFO L175 Difference]: Start difference. First operand has 365 places, 607 transitions, 8250 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:19:42,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 631 transitions, 9655 flow [2024-06-21 17:19:46,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 631 transitions, 9440 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 17:19:46,025 INFO L231 Difference]: Finished difference. Result has 367 places, 609 transitions, 8262 flow [2024-06-21 17:19:46,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8035, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8262, PETRI_PLACES=367, PETRI_TRANSITIONS=609} [2024-06-21 17:19:46,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-21 17:19:46,025 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 609 transitions, 8262 flow [2024-06-21 17:19:46,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:46,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:46,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:46,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 17:19:46,026 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:46,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:46,026 INFO L85 PathProgramCache]: Analyzing trace with hash 704179316, now seen corresponding path program 9 times [2024-06-21 17:19:46,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:46,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007069465] [2024-06-21 17:19:46,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:46,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:49,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:49,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007069465] [2024-06-21 17:19:49,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007069465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:49,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:49,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:49,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686331476] [2024-06-21 17:19:49,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:49,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:49,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:49,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:49,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:49,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:19:49,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 609 transitions, 8262 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:49,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:49,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:19:49,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:51,319 INFO L124 PetriNetUnfolderBase]: 4691/7740 cut-off events. [2024-06-21 17:19:51,319 INFO L125 PetriNetUnfolderBase]: For 872668/872701 co-relation queries the response was YES. [2024-06-21 17:19:51,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52834 conditions, 7740 events. 4691/7740 cut-off events. For 872668/872701 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 52448 event pairs, 844 based on Foata normal form. 28/7749 useless extension candidates. Maximal degree in co-relation 52659. Up to 6473 conditions per place. [2024-06-21 17:19:51,434 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 549 selfloop transitions, 81 changer transitions 0/635 dead transitions. [2024-06-21 17:19:51,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 635 transitions, 9650 flow [2024-06-21 17:19:51,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:19:51,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:19:51,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:19:51,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 17:19:51,435 INFO L175 Difference]: Start difference. First operand has 367 places, 609 transitions, 8262 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:19:51,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 635 transitions, 9650 flow [2024-06-21 17:19:55,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 635 transitions, 9426 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 17:19:55,948 INFO L231 Difference]: Finished difference. Result has 369 places, 609 transitions, 8207 flow [2024-06-21 17:19:55,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8038, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8207, PETRI_PLACES=369, PETRI_TRANSITIONS=609} [2024-06-21 17:19:55,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-21 17:19:55,949 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 609 transitions, 8207 flow [2024-06-21 17:19:55,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:55,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:55,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:55,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 17:19:55,950 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:55,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:55,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1519908178, now seen corresponding path program 10 times [2024-06-21 17:19:55,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:55,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005883315] [2024-06-21 17:19:55,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:55,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:58,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:58,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005883315] [2024-06-21 17:19:58,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005883315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:58,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:58,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:19:58,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896714396] [2024-06-21 17:19:58,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:58,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:19:58,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:58,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:19:58,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:19:58,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:19:58,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 609 transitions, 8207 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:58,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:58,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:19:58,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:01,307 INFO L124 PetriNetUnfolderBase]: 4699/7752 cut-off events. [2024-06-21 17:20:01,308 INFO L125 PetriNetUnfolderBase]: For 807045/807078 co-relation queries the response was YES. [2024-06-21 17:20:01,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52815 conditions, 7752 events. 4699/7752 cut-off events. For 807045/807078 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 52633 event pairs, 860 based on Foata normal form. 18/7751 useless extension candidates. Maximal degree in co-relation 52639. Up to 6647 conditions per place. [2024-06-21 17:20:01,425 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 537 selfloop transitions, 91 changer transitions 0/633 dead transitions. [2024-06-21 17:20:01,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 633 transitions, 9610 flow [2024-06-21 17:20:01,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:20:01,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:20:01,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 17:20:01,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 17:20:01,426 INFO L175 Difference]: Start difference. First operand has 369 places, 609 transitions, 8207 flow. Second operand 8 states and 134 transitions. [2024-06-21 17:20:01,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 633 transitions, 9610 flow [2024-06-21 17:20:05,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 633 transitions, 9419 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 17:20:05,820 INFO L231 Difference]: Finished difference. Result has 370 places, 611 transitions, 8266 flow [2024-06-21 17:20:05,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8016, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8266, PETRI_PLACES=370, PETRI_TRANSITIONS=611} [2024-06-21 17:20:05,820 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-21 17:20:05,820 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 611 transitions, 8266 flow [2024-06-21 17:20:05,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:05,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:05,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:05,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 17:20:05,821 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:05,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:05,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1563846498, now seen corresponding path program 13 times [2024-06-21 17:20:05,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:05,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177859744] [2024-06-21 17:20:05,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:05,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:08,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:08,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177859744] [2024-06-21 17:20:08,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177859744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:08,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:08,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:08,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294788128] [2024-06-21 17:20:08,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:08,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:08,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:08,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:08,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:08,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:20:08,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 611 transitions, 8266 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:08,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:08,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:20:08,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:11,518 INFO L124 PetriNetUnfolderBase]: 4725/7802 cut-off events. [2024-06-21 17:20:11,519 INFO L125 PetriNetUnfolderBase]: For 838016/838049 co-relation queries the response was YES. [2024-06-21 17:20:11,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53494 conditions, 7802 events. 4725/7802 cut-off events. For 838016/838049 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 52993 event pairs, 1059 based on Foata normal form. 2/7781 useless extension candidates. Maximal degree in co-relation 53317. Up to 5289 conditions per place. [2024-06-21 17:20:11,631 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 277 selfloop transitions, 357 changer transitions 0/639 dead transitions. [2024-06-21 17:20:11,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 639 transitions, 10530 flow [2024-06-21 17:20:11,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:20:11,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:20:11,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 17:20:11,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 17:20:11,633 INFO L175 Difference]: Start difference. First operand has 370 places, 611 transitions, 8266 flow. Second operand 9 states and 155 transitions. [2024-06-21 17:20:11,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 639 transitions, 10530 flow [2024-06-21 17:20:15,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 639 transitions, 10303 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 17:20:15,826 INFO L231 Difference]: Finished difference. Result has 373 places, 617 transitions, 8941 flow [2024-06-21 17:20:15,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8039, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8941, PETRI_PLACES=373, PETRI_TRANSITIONS=617} [2024-06-21 17:20:15,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-21 17:20:15,826 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 617 transitions, 8941 flow [2024-06-21 17:20:15,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:15,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:15,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:15,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 17:20:15,827 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:15,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:15,827 INFO L85 PathProgramCache]: Analyzing trace with hash 309506610, now seen corresponding path program 14 times [2024-06-21 17:20:15,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:15,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838006418] [2024-06-21 17:20:15,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:15,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:18,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:18,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838006418] [2024-06-21 17:20:18,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838006418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:18,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:18,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:18,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408398786] [2024-06-21 17:20:18,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:18,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:18,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:18,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:18,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:19,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:20:19,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 617 transitions, 8941 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:19,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:19,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:20:19,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:21,709 INFO L124 PetriNetUnfolderBase]: 4729/7812 cut-off events. [2024-06-21 17:20:21,710 INFO L125 PetriNetUnfolderBase]: For 856104/856137 co-relation queries the response was YES. [2024-06-21 17:20:21,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54244 conditions, 7812 events. 4729/7812 cut-off events. For 856104/856137 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 53153 event pairs, 1045 based on Foata normal form. 4/7793 useless extension candidates. Maximal degree in co-relation 54066. Up to 5290 conditions per place. [2024-06-21 17:20:21,822 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 290 selfloop transitions, 346 changer transitions 0/641 dead transitions. [2024-06-21 17:20:21,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 641 transitions, 10872 flow [2024-06-21 17:20:21,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:20:21,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:20:21,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 17:20:21,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 17:20:21,824 INFO L175 Difference]: Start difference. First operand has 373 places, 617 transitions, 8941 flow. Second operand 9 states and 155 transitions. [2024-06-21 17:20:21,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 641 transitions, 10872 flow [2024-06-21 17:20:26,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 641 transitions, 9896 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-21 17:20:26,433 INFO L231 Difference]: Finished difference. Result has 374 places, 620 transitions, 8763 flow [2024-06-21 17:20:26,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7981, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8763, PETRI_PLACES=374, PETRI_TRANSITIONS=620} [2024-06-21 17:20:26,434 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-21 17:20:26,434 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 620 transitions, 8763 flow [2024-06-21 17:20:26,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:26,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:26,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:26,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 17:20:26,435 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:26,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:26,435 INFO L85 PathProgramCache]: Analyzing trace with hash 309506393, now seen corresponding path program 17 times [2024-06-21 17:20:26,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:26,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686357161] [2024-06-21 17:20:26,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:26,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:29,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:29,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686357161] [2024-06-21 17:20:29,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686357161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:29,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:29,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:29,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511869054] [2024-06-21 17:20:29,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:29,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:29,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:29,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:29,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:29,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:20:29,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 620 transitions, 8763 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:29,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:29,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:20:29,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:32,061 INFO L124 PetriNetUnfolderBase]: 4739/7828 cut-off events. [2024-06-21 17:20:32,062 INFO L125 PetriNetUnfolderBase]: For 844351/844384 co-relation queries the response was YES. [2024-06-21 17:20:32,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54039 conditions, 7828 events. 4739/7828 cut-off events. For 844351/844384 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 53276 event pairs, 944 based on Foata normal form. 4/7811 useless extension candidates. Maximal degree in co-relation 53860. Up to 6169 conditions per place. [2024-06-21 17:20:32,167 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 398 selfloop transitions, 241 changer transitions 0/644 dead transitions. [2024-06-21 17:20:32,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 644 transitions, 10395 flow [2024-06-21 17:20:32,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:20:32,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:20:32,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 17:20:32,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 17:20:32,168 INFO L175 Difference]: Start difference. First operand has 374 places, 620 transitions, 8763 flow. Second operand 9 states and 150 transitions. [2024-06-21 17:20:32,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 644 transitions, 10395 flow [2024-06-21 17:20:36,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 644 transitions, 9431 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-21 17:20:36,227 INFO L231 Difference]: Finished difference. Result has 376 places, 623 transitions, 8329 flow [2024-06-21 17:20:36,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7801, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8329, PETRI_PLACES=376, PETRI_TRANSITIONS=623} [2024-06-21 17:20:36,228 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-21 17:20:36,228 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 623 transitions, 8329 flow [2024-06-21 17:20:36,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:36,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:36,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:36,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 17:20:36,228 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:36,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:36,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1287175129, now seen corresponding path program 18 times [2024-06-21 17:20:36,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:36,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929015685] [2024-06-21 17:20:36,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:36,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:38,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:38,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929015685] [2024-06-21 17:20:38,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929015685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:38,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:38,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:38,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351490819] [2024-06-21 17:20:38,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:38,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:38,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:38,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:38,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:38,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:20:38,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 623 transitions, 8329 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:38,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:38,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:20:38,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:41,930 INFO L124 PetriNetUnfolderBase]: 4749/7846 cut-off events. [2024-06-21 17:20:41,930 INFO L125 PetriNetUnfolderBase]: For 853883/853916 co-relation queries the response was YES. [2024-06-21 17:20:42,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52795 conditions, 7846 events. 4749/7846 cut-off events. For 853883/853916 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 53385 event pairs, 942 based on Foata normal form. 4/7829 useless extension candidates. Maximal degree in co-relation 52616. Up to 6179 conditions per place. [2024-06-21 17:20:42,030 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 387 selfloop transitions, 257 changer transitions 0/649 dead transitions. [2024-06-21 17:20:42,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 649 transitions, 9981 flow [2024-06-21 17:20:42,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:20:42,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:20:42,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 17:20:42,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-21 17:20:42,032 INFO L175 Difference]: Start difference. First operand has 376 places, 623 transitions, 8329 flow. Second operand 10 states and 162 transitions. [2024-06-21 17:20:42,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 649 transitions, 9981 flow [2024-06-21 17:20:45,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 649 transitions, 9531 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:20:45,553 INFO L231 Difference]: Finished difference. Result has 380 places, 626 transitions, 8445 flow [2024-06-21 17:20:45,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7882, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8445, PETRI_PLACES=380, PETRI_TRANSITIONS=626} [2024-06-21 17:20:45,553 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-21 17:20:45,554 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 626 transitions, 8445 flow [2024-06-21 17:20:45,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:45,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:45,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:45,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 17:20:45,554 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:45,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:45,555 INFO L85 PathProgramCache]: Analyzing trace with hash 453396923, now seen corresponding path program 19 times [2024-06-21 17:20:45,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:45,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570018400] [2024-06-21 17:20:45,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:45,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:48,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:48,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570018400] [2024-06-21 17:20:48,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570018400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:48,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:48,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:48,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085147064] [2024-06-21 17:20:48,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:48,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:48,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:48,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:48,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:48,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:20:48,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 626 transitions, 8445 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:48,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:48,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:20:48,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:51,011 INFO L124 PetriNetUnfolderBase]: 4743/7824 cut-off events. [2024-06-21 17:20:51,011 INFO L125 PetriNetUnfolderBase]: For 849539/849572 co-relation queries the response was YES. [2024-06-21 17:20:51,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52665 conditions, 7824 events. 4743/7824 cut-off events. For 849539/849572 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 53107 event pairs, 944 based on Foata normal form. 4/7807 useless extension candidates. Maximal degree in co-relation 52485. Up to 6174 conditions per place. [2024-06-21 17:20:51,125 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 387 selfloop transitions, 254 changer transitions 0/646 dead transitions. [2024-06-21 17:20:51,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 646 transitions, 9779 flow [2024-06-21 17:20:51,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:20:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:20:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 17:20:51,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-21 17:20:51,127 INFO L175 Difference]: Start difference. First operand has 380 places, 626 transitions, 8445 flow. Second operand 9 states and 148 transitions. [2024-06-21 17:20:51,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 646 transitions, 9779 flow [2024-06-21 17:20:55,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 646 transitions, 9044 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 17:20:55,827 INFO L231 Difference]: Finished difference. Result has 380 places, 626 transitions, 8224 flow [2024-06-21 17:20:55,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7710, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8224, PETRI_PLACES=380, PETRI_TRANSITIONS=626} [2024-06-21 17:20:55,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-21 17:20:55,828 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 626 transitions, 8224 flow [2024-06-21 17:20:55,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:55,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:55,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:55,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 17:20:55,828 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:55,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:55,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1513234994, now seen corresponding path program 15 times [2024-06-21 17:20:55,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:55,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137518809] [2024-06-21 17:20:55,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:55,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:58,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:58,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137518809] [2024-06-21 17:20:58,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137518809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:58,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:58,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:58,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112789039] [2024-06-21 17:20:58,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:58,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:58,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:58,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:58,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:58,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:20:58,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 626 transitions, 8224 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:58,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:58,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:20:58,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:01,410 INFO L124 PetriNetUnfolderBase]: 4737/7816 cut-off events. [2024-06-21 17:21:01,410 INFO L125 PetriNetUnfolderBase]: For 840823/840856 co-relation queries the response was YES. [2024-06-21 17:21:01,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52149 conditions, 7816 events. 4737/7816 cut-off events. For 840823/840856 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 53018 event pairs, 1056 based on Foata normal form. 2/7795 useless extension candidates. Maximal degree in co-relation 51969. Up to 5296 conditions per place. [2024-06-21 17:21:01,524 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 274 selfloop transitions, 368 changer transitions 0/647 dead transitions. [2024-06-21 17:21:01,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 647 transitions, 10086 flow [2024-06-21 17:21:01,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:21:01,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:21:01,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 17:21:01,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 17:21:01,525 INFO L175 Difference]: Start difference. First operand has 380 places, 626 transitions, 8224 flow. Second operand 9 states and 154 transitions. [2024-06-21 17:21:01,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 647 transitions, 10086 flow [2024-06-21 17:21:06,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 647 transitions, 9444 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-21 17:21:06,183 INFO L231 Difference]: Finished difference. Result has 379 places, 626 transitions, 8324 flow [2024-06-21 17:21:06,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7582, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8324, PETRI_PLACES=379, PETRI_TRANSITIONS=626} [2024-06-21 17:21:06,184 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-21 17:21:06,184 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 626 transitions, 8324 flow [2024-06-21 17:21:06,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:06,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:06,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:06,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 17:21:06,184 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:06,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:06,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1505616434, now seen corresponding path program 16 times [2024-06-21 17:21:06,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:06,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997926627] [2024-06-21 17:21:06,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:06,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:09,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:09,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997926627] [2024-06-21 17:21:09,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997926627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:09,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:09,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:09,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386088344] [2024-06-21 17:21:09,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:09,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:09,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:09,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:09,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:09,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:21:09,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 626 transitions, 8324 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:09,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:09,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:21:09,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:12,310 INFO L124 PetriNetUnfolderBase]: 4731/7820 cut-off events. [2024-06-21 17:21:12,310 INFO L125 PetriNetUnfolderBase]: For 835273/835306 co-relation queries the response was YES. [2024-06-21 17:21:12,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52118 conditions, 7820 events. 4731/7820 cut-off events. For 835273/835306 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 53223 event pairs, 1062 based on Foata normal form. 2/7799 useless extension candidates. Maximal degree in co-relation 51937. Up to 5293 conditions per place. [2024-06-21 17:21:12,612 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 280 selfloop transitions, 361 changer transitions 0/646 dead transitions. [2024-06-21 17:21:12,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 646 transitions, 9920 flow [2024-06-21 17:21:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:21:12,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:21:12,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 17:21:12,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 17:21:12,613 INFO L175 Difference]: Start difference. First operand has 379 places, 626 transitions, 8324 flow. Second operand 9 states and 153 transitions. [2024-06-21 17:21:12,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 646 transitions, 9920 flow [2024-06-21 17:21:17,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 646 transitions, 9147 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 17:21:17,560 INFO L231 Difference]: Finished difference. Result has 381 places, 626 transitions, 8279 flow [2024-06-21 17:21:17,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7551, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=361, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8279, PETRI_PLACES=381, PETRI_TRANSITIONS=626} [2024-06-21 17:21:17,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-21 17:21:17,560 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 626 transitions, 8279 flow [2024-06-21 17:21:17,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:17,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:17,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:17,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 17:21:17,561 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:17,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:17,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1166589266, now seen corresponding path program 11 times [2024-06-21 17:21:17,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:17,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119727016] [2024-06-21 17:21:17,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:17,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:20,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:20,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119727016] [2024-06-21 17:21:20,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119727016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:20,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:20,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:20,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318662136] [2024-06-21 17:21:20,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:20,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:20,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:20,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:20,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:20,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:21:20,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 626 transitions, 8279 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:20,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:20,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:21:20,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:22,981 INFO L124 PetriNetUnfolderBase]: 4739/7814 cut-off events. [2024-06-21 17:21:22,981 INFO L125 PetriNetUnfolderBase]: For 846656/846689 co-relation queries the response was YES. [2024-06-21 17:21:23,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52221 conditions, 7814 events. 4739/7814 cut-off events. For 846656/846689 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 52913 event pairs, 802 based on Foata normal form. 18/7813 useless extension candidates. Maximal degree in co-relation 52039. Up to 5876 conditions per place. [2024-06-21 17:21:23,275 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 546 selfloop transitions, 104 changer transitions 0/655 dead transitions. [2024-06-21 17:21:23,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 655 transitions, 10040 flow [2024-06-21 17:21:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:23,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:23,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:21:23,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 17:21:23,277 INFO L175 Difference]: Start difference. First operand has 381 places, 626 transitions, 8279 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:21:23,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 655 transitions, 10040 flow [2024-06-21 17:21:28,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 655 transitions, 9237 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 17:21:28,262 INFO L231 Difference]: Finished difference. Result has 379 places, 628 transitions, 7752 flow [2024-06-21 17:21:28,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7476, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7752, PETRI_PLACES=379, PETRI_TRANSITIONS=628} [2024-06-21 17:21:28,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-21 17:21:28,263 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 628 transitions, 7752 flow [2024-06-21 17:21:28,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:28,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:28,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:28,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 17:21:28,264 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:28,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:28,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1160875346, now seen corresponding path program 12 times [2024-06-21 17:21:28,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:28,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566009445] [2024-06-21 17:21:28,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:28,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:31,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:31,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566009445] [2024-06-21 17:21:31,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566009445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:31,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:31,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:31,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404970623] [2024-06-21 17:21:31,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:31,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:31,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:31,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:31,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:31,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:21:31,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 628 transitions, 7752 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:31,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:31,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:21:31,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:33,832 INFO L124 PetriNetUnfolderBase]: 4714/7773 cut-off events. [2024-06-21 17:21:33,832 INFO L125 PetriNetUnfolderBase]: For 836136/836169 co-relation queries the response was YES. [2024-06-21 17:21:33,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50229 conditions, 7773 events. 4714/7773 cut-off events. For 836136/836169 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 52750 event pairs, 823 based on Foata normal form. 24/7778 useless extension candidates. Maximal degree in co-relation 50047. Up to 5862 conditions per place. [2024-06-21 17:21:33,954 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 553 selfloop transitions, 96 changer transitions 0/654 dead transitions. [2024-06-21 17:21:33,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 654 transitions, 9166 flow [2024-06-21 17:21:33,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:33,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:33,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:21:33,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 17:21:33,955 INFO L175 Difference]: Start difference. First operand has 379 places, 628 transitions, 7752 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:21:33,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 654 transitions, 9166 flow [2024-06-21 17:21:37,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 654 transitions, 8881 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-21 17:21:37,871 INFO L231 Difference]: Finished difference. Result has 382 places, 628 transitions, 7665 flow [2024-06-21 17:21:37,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7467, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7665, PETRI_PLACES=382, PETRI_TRANSITIONS=628} [2024-06-21 17:21:37,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-21 17:21:37,872 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 628 transitions, 7665 flow [2024-06-21 17:21:37,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:37,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:37,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:37,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 17:21:37,873 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:37,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:37,873 INFO L85 PathProgramCache]: Analyzing trace with hash -286980844, now seen corresponding path program 1 times [2024-06-21 17:21:37,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:37,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203661544] [2024-06-21 17:21:37,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:37,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:40,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:40,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203661544] [2024-06-21 17:21:40,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203661544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:40,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:40,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:40,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649997056] [2024-06-21 17:21:40,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:40,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:40,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:40,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:40,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:40,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:21:40,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 628 transitions, 7665 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:40,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:40,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:21:40,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:43,533 INFO L124 PetriNetUnfolderBase]: 4801/7912 cut-off events. [2024-06-21 17:21:43,533 INFO L125 PetriNetUnfolderBase]: For 944207/944209 co-relation queries the response was YES. [2024-06-21 17:21:43,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52674 conditions, 7912 events. 4801/7912 cut-off events. For 944207/944209 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 53828 event pairs, 1119 based on Foata normal form. 8/7917 useless extension candidates. Maximal degree in co-relation 52491. Up to 7196 conditions per place. [2024-06-21 17:21:43,643 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 646 selfloop transitions, 21 changer transitions 0/672 dead transitions. [2024-06-21 17:21:43,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 672 transitions, 9511 flow [2024-06-21 17:21:43,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:21:43,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:21:43,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-21 17:21:43,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-21 17:21:43,644 INFO L175 Difference]: Start difference. First operand has 382 places, 628 transitions, 7665 flow. Second operand 10 states and 167 transitions. [2024-06-21 17:21:43,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 672 transitions, 9511 flow [2024-06-21 17:21:47,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 672 transitions, 9291 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 17:21:47,466 INFO L231 Difference]: Finished difference. Result has 384 places, 630 transitions, 7569 flow [2024-06-21 17:21:47,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7445, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7569, PETRI_PLACES=384, PETRI_TRANSITIONS=630} [2024-06-21 17:21:47,466 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-21 17:21:47,466 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 630 transitions, 7569 flow [2024-06-21 17:21:47,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:47,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:47,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:47,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 17:21:47,467 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:47,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:47,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1160011498, now seen corresponding path program 2 times [2024-06-21 17:21:47,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:47,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919467530] [2024-06-21 17:21:47,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:47,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:50,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:50,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919467530] [2024-06-21 17:21:50,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919467530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:50,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:50,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:50,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499895258] [2024-06-21 17:21:50,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:50,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:50,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:50,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:50,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:50,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:21:50,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 630 transitions, 7569 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:50,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:50,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:21:50,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:52,905 INFO L124 PetriNetUnfolderBase]: 4778/7879 cut-off events. [2024-06-21 17:21:52,905 INFO L125 PetriNetUnfolderBase]: For 880788/880790 co-relation queries the response was YES. [2024-06-21 17:21:52,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50495 conditions, 7879 events. 4778/7879 cut-off events. For 880788/880790 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 53630 event pairs, 1142 based on Foata normal form. 10/7886 useless extension candidates. Maximal degree in co-relation 50311. Up to 7240 conditions per place. [2024-06-21 17:21:53,020 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 639 selfloop transitions, 18 changer transitions 0/662 dead transitions. [2024-06-21 17:21:53,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 662 transitions, 9001 flow [2024-06-21 17:21:53,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:21:53,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:21:53,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 17:21:53,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 17:21:53,022 INFO L175 Difference]: Start difference. First operand has 384 places, 630 transitions, 7569 flow. Second operand 9 states and 147 transitions. [2024-06-21 17:21:53,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 662 transitions, 9001 flow [2024-06-21 17:21:57,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 662 transitions, 8931 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:57,344 INFO L231 Difference]: Finished difference. Result has 387 places, 630 transitions, 7540 flow [2024-06-21 17:21:57,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7499, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7540, PETRI_PLACES=387, PETRI_TRANSITIONS=630} [2024-06-21 17:21:57,348 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-21 17:21:57,348 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 630 transitions, 7540 flow [2024-06-21 17:21:57,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:57,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:57,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:57,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 17:21:57,349 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:57,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:57,349 INFO L85 PathProgramCache]: Analyzing trace with hash -376890092, now seen corresponding path program 3 times [2024-06-21 17:21:57,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:57,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363818475] [2024-06-21 17:21:57,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:57,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:00,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:00,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363818475] [2024-06-21 17:22:00,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363818475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:00,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:00,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:00,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125405847] [2024-06-21 17:22:00,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:00,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:00,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:00,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:00,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:00,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:22:00,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 630 transitions, 7540 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:00,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:00,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:22:00,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15